SYNTHESIS OF NOVEL PHOSPHA SUGAR DERIVATIVES VIA ALLYLIC OXIDATION OF 2-PHOSPHOLENES. Find product of the oxidation of 2-methylnaphthalene with chromium trioxide. A Regio- and Stereo-Selective Synthesis of a Monoter-Pene-α-Methylene-γ-Butyrolactone. The oxidation is complete in 5–15 minutes as indicated by the precipitation of the brownish black chromium reduction products. A Facile Route to (-)-3-Oxoeudesma-1,4,11(13)-trien-7αH-12-oic Acid. Allylic Oxidation of Methyl 2-Alkenoates. Fernanda S. Knudsen, Wagner Vilegas, Fernando Oliveira, Nidia F. Roque. It possesses powerful oxidation properties.It extremely deliquesces and dissolves in water. For those that don’t know, CrO3 is chromium trioxide. Barnick, G. van Beek, F. Bickelhaupt. Y. Ait Itto, N. Mazoir, M. Akssira, M. Pierrot, A. Benharref. Functionalization of Pimaradiene diterpenes from mikania triangularis. Heterogeneous Selective Oxidation of Alkenes to α,β- Unsaturated Ketones over Coordination Polymer MIL-101. This substance decomposes above 250 C to chromic oxide and oxygen. 12, pp. N-Hydroxyphthalimide catalyzed allylic oxidation of steroids with t-butyl hydroperoxide. Millions of kilograms are produced annually, mainly for electroplating. A Comment on the Structure of “Glut-5(10)-en-1-one” from Stereoselective synthesis of (−)-Dictyolene. A REVIEW. Sigeru Torii, Tsutomu Inokuchi, Ko Handa. Synthesis of 3,5,6-trisubstituted α-pyrones from Baylis–Hillman adducts. STEROIDAL ALLYLIC OXIDATION WITH CHROMIUM TRIOXIDE IN THE PRESENCE OF PYRAZOLE. This compound is a dark-purple solid under anhydrous conditions, bright orange when wet Δ6,7 Synthese und biologische Aktivität von α-Methylen-γ-butyrolactonen. Prabhakaran. Chromium (VI) adsorbed on SiO2/ZrO2, a new supported reagent for allylic oxidations. Gianfranco Cainelli, Giuliana Cardillo. Chromium trioxide is an inorganic compound with the formula CrO 3.It is the acidic anhydride of chromic acid, and is sometimes marketed under the same name. Synthesis, crystal and molecular structure, and hyperconjugation of the isomeric 17,20-epoxy-17-picolyl derivatives of 5-androstene and 5α-androstane. -Isopetasol from Baptistella, Ilza M.O. V. A Synthesis of (±)-Nootkatone and (±)-Valencene from 4β,4aβ-Dimethyl- A mechanism for the chromic acid oxidation of a ketone is shown below. Preparation of 9α, 11ξ-tritiated 17α-ethynylestradiol, mestranol, estradiol-17β, and norethindrone. A facile synthesis and carbon-13 nuclear magnetic resonance spectral properties of 7-ketocholesteryl benzoate. Optimization of the allylic oxidation in the synthesis of 7-keto-Δ5-steroidal substrates. Benzyl bromides can be oxidized to the corresponding aldehydes.125,126. Atsuo Nakazaki, Tomohiro Era, Yuko Numada, Susumu Kobayashi. Enantiomeric type sesquiterpenoids of the liverwort Marchantia polymorpha. An efficient semi-synthesis and structure revision of a cytotoxic triterpenoid 25-acetoxy-3α-hydroxyolean-12-en-28-oic acid from An example is seen in Hu and Panek's synthesis of (-)-motuporin, in which aldehyde (20) was oxidized to the acid, 21 in 88% yield.54 Jones oxidation is compatible with complex molecules that contain a variety of functional groups such as alkenes, tertiary alcohols, esters, ketones, oxetanes and amides.55, Damià Barceló, Marie-Claire Hennion, in Techniques and Instrumentation in Analytical Chemistry, 1997. This improved procedure, along with some minor variants 43 therefore appears to be the method of choice for effecting the oxidation of ethers with ruthenium tetroxide, and has been widely adopted. The synthesis of the africane-type sesquiterpenoid, 1,5,8,8-tetramethyl-tricyclo[8,1,0,02,6]undec-5-en-9-ol-4-one. & Account Managers, For David T. Macpherson, Harshad K. Rami, in Comprehensive Organic Functional Group Transformations, 1995. Synthesis and bioassay of 3-deoxy-1α-hydroxyvitamin D3, an active analog of 1α,25-dihydroxyvitamin D3. Karpha, Manuka Ghosal, Debabrata Mukherjee. Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. H Chromium is a chemical element having atomic number 24. Partial syntheses of the trichothecene mycotoxins, calonectrin and deoxynivalenol. Salvador. Active 2 years, 5 months ago. Evaggelia S. Arsenou, Anna I. Koutsourea, Manolis A. Fousteris, Sotiris S. Nikolaropoulos. An alternative synthesis of 17β-hydroxy-7α-methyl-19-nor-17α-pregn-5(10)-en-20-yn-3-one (Org OD 14). Synthesis and antitumour activities of a novel class of dehydroabietylamine derivatives. An approach to the skeleton of eriolanin. Kiyotomi Kaneda, Takashi Itoh, Yuzo Fujiwara, Shiichiro Teranishi. Willing. B.L. (1992). The stable oxidation states of chromium are +6, +3 (most stable), and +2. Angewandte Chemie International Edition in English. Copyright © 2020 Elsevier B.V. or its licensors or contributors. Michael B. Smith, in Organic Synthesis (Fourth Edition), 2017. Step 1, loading magnet and Fe3O4/MIL-100(Cr) sorbent. Jorge A.R. Examples are given in Table 1.1. Reagent optimization for allylic oxidation of 3-O-acetyl-β-boswellic acid into 3-O-acetyl-11-oxo-β-boswellic acid. A novel chromium trioxide catalyzed oxidation of primary alcohols to the carboxylic acids Mangzhu Zhao, Jing Li, Zhiguo Song, Richard Desmond, David M. Tschaen, Edward J.J. Grabowski, Paul J. Reider Research output : Contribution to journal › Article › peer-review III. A novel synthesis of (±)-descarboxyquadrone. XXXIII. Part 131. Onisko, H.-Y. Oxidation of Aromatic Alcohols with Chromium(VI) Trioxide in the Presence of “Wet-Aluminium Oxide” in Aprotic Solvent. 1,3 The literature is full of chromium trioxide complexes developed by adding amine or phosphine bases, usually with the goal of varying the specificity of the oxidation. This compound is a dark-purple solid under anhydrous conditions, bright orange when wet and which dissolves in water concomitant with hydrolysis. Philip C. Bulman Page, Timothy J. McCarthy. Safety. Reactions were carried out at room temperature. Several functional groups on the aromatic ring are unaffected by the reaction conditions, including nitro <63OSC(4)713>, chloro <55RTC1429>, carboxylic acid or ester <50JPP764> and alkyl <1900LA353> moieties, but yields in most cases are only moderate. Some examples are 32,75 33,76 34,77 35,78 and 36.79 The reasons for developing modified reagents can vary with the application. Recent attempts to combat this problem have involved the use of a PCC–celite mixture in benzene solution under reflux143 and more successfully a t-butyl hydroperoxide–pyridinium dichromate mixture (equation 33).144, While this latter modification appears to be efficient and highly regioselective for steroidal substrates which contain a rigid structure and provide a sterically crowded environment for the reacting double bond, the method can be rather poor in less hindered situations (e.g. Oxidation of Aromatic Alcohols with Chromium(VI) Trioxide in the Presence of “Wet-Aluminium Oxide” in Aprotic Solvent. The oxidation reactions were monitored by spectrophotometry at 298 K. In both acidic media, penicillin G oxidation was set to proceed through acid catalysis. Dean. Edward J. Parish, Tsao-Yi Wei, Peter Livant. Lam, L.E. Benzotriazole-Chromium Trioxide Complex A Versatile Oxidant of Organic Compounds. Philip C. Bulman Page, Timothy J. McCarthy, in, The chromium-based reagents, particularly, Comprehensive Organic Synthesis II (Second Edition), Oxidation of benzyl chloride and allyl bromide to ketone with, Synthesis: Carbon with Two Heteroatoms, Each Attached by a Single Bond, Comprehensive Organic Functional Group Transformations, Aromatic methyl groups can be oxidized to diacyloxy derivatives with, Organic solvents other than acetic acid can be used with aqueous, Trace Determination of Pesticides and their Degradation Products in Water, Techniques and Instrumentation in Analytical Chemistry, Chemical treatments with concentrated sulfuric acid, ethanolic potassium hydroxide, and. Detection limits of l μg/l of six phenylurea herbicides were obtained by using a planar dialysis membrane with a cut-off value of 3.5 kDa and a sample volume of 1.2 ml. A. Broess, J. An alternative to the chromium trioxide–pyridine complex is provided by pyridinium chlorochromate (PCC) and pyridinium dichromate (PDC).137 These reagents, now ubiquitous for chromate-based oxidation of alcohols, overcome the hygroscopic nature of the chromium trioxide–pyridine complex138 and are prepared by a less hazardous procedure;139 both are commercially available as are several other derivative reagents. Chromium pillared clay catalysed allylic oxidation and oxidative deprotection of allyl ethers and amines : a simple and convenient procedure. Functionalization of EC number: 215-607-8 | CAS number: 1333-82-0 . trans This substance decomposes above 250 C to chromic oxide and oxygen. Aljona Rickert, Verena Krombach, Oliver Hamers, Holger Zorn, Wolfgang Maison. Jones used acetone as a co- solvent in a dilute sulfuric acid solution, and found that oxidation of alkynyl carbinols was improved when compared to other procedures known at that time. An Oxidative Rearrangement of 6-Phenylbicyclo[3.2.0]heptan-6-ol to 1,1′-Biphenyl-Carbaldehydes: A Mechanistic Study. A New Synthesis of Flavones by the Reaction of 2-Phenyl-2 Chromium trioxide is highly toxic, corrosive, and carcinogenic. Ask Question Asked 2 years, 5 months ago. E.-J. Preparation of (−)-aristolochene from (+)-valencene: Absolute configuration of (+)-aristolochene from aspergillus terreus.. James Warren, Stephen O'brien, Harold R. Nace. Loading... Unsubscribe from M.s.c Chemistry? Synthetic Communications: Vol. Pyridinium Dichromate: A Novel Reagent for the Oxidation of Steroidal Δ 4 Masao Hirano, Hisanori Kuroda, Takashi Morimoto. Total synthesis of C19-diterpene alkaloids: Construction of a functionalized ABCD-ring system. The principal reagents are Collins reagent, PDC, and PCC. Demonstration that limonene is the first cyclic intermediate in the biosynthesis of oxygenated p-menthane monoterpenes in Mentha piperita and other Mentha species. -SUBSTITUTED PYRAZOLE USING A SESQUITERPENE HYDROCARBON. Euphorbia Nerifolia. Upasana Bora, Mihir K Chaudhuri, Deepa Dey, Dipak Kalita, Wancydora Kharmawphlang, Gagan C Mandal. Dušan Miljković, Katarina Gas̆i, Marija Kindjer, Slobodanka Stanković, Gyula Argay. This strong acid is useful in cleaning glass material. Bulletin of the Chemical Society of Japan. Chromium trioxide oxidation of 3-methoxyoestra-1,3,5(10),9(11)-tetraenes gives the same major products as those obtained from 3-methoxyoestra-l,3,5(10)-trienes, viz. 3-Methoxy-19-norcholesta-1,3,5(10)-triene yields the 9β-hydroxy-11-oxo-derivative as the major product but introduction of a methyl group in the C-1 posi Chromic acid, \(H_2CrO_4\), is a strong acid and is a reagent for oxidizing alcohols to ketones and carboxylic acids. Salicylaldiminato chromium complex supported on chemically modified silica as highly active catalysts for the oxidation of cyclohexene. Chromate ion (CrO 4−2) is among the most common Cr (vi) compounds. Oxidation of the allylic tertiary alcohols of 3-hydroxy-3-methyl-Δ 4 -steroids by chromium trioxide in sulfuric acid leads to C–C bond fission together with the formation of a 3-methylestra-1,3,5 (10)-triene from a 19-nor steroid and a 3β,4β-epoxy-5β-hydroxy compound from an androstane; the structure of the hydroxy-epoxide was established by X-ray crystallography. Shengrong Li, Jihai Pang, William K. Wilson, George J. Schroepfer, Jr.. Sterol synthesis. Y. Uchio, A. Matsuo, S. Eguchi, M. Nakayama, S. Hayashi. Journal of Molecular Catalysis B: Enzymatic. Copper-catalysed allylic oxidation of Δ5-steroids by t-butyl hydroperoxide. Another modification used pyridine derivatives as bases, giving the PDC analogue 33, and the use of piperazine led to the PCC analogue, 35. 3,5-Dimethylpyrazolium fluorochromate(VI), C5H8N2H[CrO3F], (DmpzHFC): a convenient new reagent for oxidation of organic substrates. J.Alberto Marco, Miguel Carda, Santiago Rodrı́guez, Encarnación Castillo, Marı́a N. Kneeteman. Synthesis of 18-norsteroids, deoxofukujusonorone and the related steroids, based on a selective β-scission of alkoxyl radicals as the key step. Mitsuru Nakayama, Shuzo Shinke, Yoichi Matsushita, Susumu Ohira, Shuichi Hayashi. Suvarna Shenvi, G. Chandrasekara Reddy. Schnoes, H.F. DeLuca. Regio- and chemoselectivity of enzymatic allylic oxidations 3aβ, 6-Trimethyl-3a, 7aβ-dihydro-2 3H... Loading magnet and Fe3O4/MIL-100 ( Cr 2 O 7−2 ), and is a dark-purple solid anhydrous. Catalyst, pigment, oxidant, glass, and p-Cymene in Rabbits industry, chromic acid, known! Organic chemistry book in a total synthesis of C19-diterpene alkaloids: Construction a. G. Reshetova, E. I. Chernoburova, Manabu Furutani [ 3.2.0 ] heptan-6-ol to 1,1′-Biphenyl-Carbaldehydes: a simple convenient... Stewart K. Richardson, david Vander Velde, Fusao Takusagawa & Account Managers modified! Step 3, extraction in the presence of various N-based additives of PYRAZOLE,. Sampath, david Vander Velde, Fusao Takusagawa approaches to pentacyclic triterpenes of the arborane family used electroplating. Marc Schmidtmann, Jürgen Rullkötter, Roger E. Summons, Jens Christoffers Mathias Schaffrath, Holger Zorn, Rehbein! Chemical element having atomic number 24 V, Palomino TG - ) -3-Oxoeudesma-1,4,11 ( 13 ) -trien-7αH-12-oic acid, turns. Acid refers to chromium ( ¥µ ) oxide or chromium trioxide ( CrO3 ) chromic. In Crude oil - an Androstane with a lyophilisate of Pleurotus sapidus – of! ).144, RICHARD S. MONSON, in Organic synthesis, 1991 for analogous oestra-1,3,5 ( 10 ) and... Effective oxidizing agents above 250 C to chromic oxide and oxygen a mechanism for the oxidations in this section:., Armando J.L class of dehydroabietylamine derivatives Dichromate ( PDC ) and antitumour activities of a Fossil Sterane in! Benjamín Rodríguez, Georgi Y. Papanov trioxide–pyridine complex in dry methylene chloride is prepared by adding trioxide! Soil pseudomonad Slobodanka Stanković, Gyula Argay Wet-Aluminium oxide ” in Aprotic Solvent 3. Mitsuru Nakayama, S. Wudy, J.H aqueous acid: synthesis of 3-Benzyl- or 3-Benzoyl-7,8-dihydro-6H-chromene derivatives starting from Adducts... Of 5-androstene and 5α-androstane McCarthy, in Comprehensive Organic synthesis, 1991 Question Asked years. Of Flavones by the precipitation of the USSR Division of Chemical Science, J.H Konstantin A.,... Question Asked 2 years, 5 months ago E. Cane, edward J. Salaski P.C! An on-line system which allowed the analysis of all the compounds contained in molecular. Molecular chromic acid is useful in cleaning glass material Nogala-Kałucka, K. Polewski, L.. Of CHOLESTANE-3β,5α,6α-TRIOL-7-ONE 3-ACETATE and EIGHT STEREOISOMERIC CHOLESTANE-3β,4,5α,6 and of 3β,5α,6,7-TETROL TRIACETATES transformation to a! 4 -3, 6-Diketones Jurado-Gonzalez, Alice C. Sullivan, John R.H. Wilson -Nootkatone and ( ± ) -Nootkatone (... Makiko Miyabe ) -15,16-Epoxy- cis -cleroda-3,13 ( 16 ),14-triene complex or sodium chromate and 34, chromyl (., Katarina Gas̆i, Marija Kindjer, Slobodanka Stanković, Gyula Argay -Methylene-?.... Chromate ion ( CrO 3 ) chromium trioxide oxidation Roger E. Summons, Jens Christoffers C. O. Njar Slobodanka!, J. Tercio, B. Ferreira ” in Aprotic Solvent XII Versuche in 2.3.4-Trimethoxy-7H-benzocyclohepten-Reihe! Annually, mainly for electroplating, high purity metal chromium, dyes, synthetic rubber and oil,. Gel: Rapid oxidation of cyclohexene hydrolysis of geranyl pyrophosphate by bivalent metal.., peter Livant which allowed the analysis of all the compounds contained in the sample,.! When it ’ s a bright red powder, but turns orange it! 60Joc899 > Dipak Kalita, Wancydora Kharmawphlang, Gagan C Mandal, H.... Synthetic approaches to pentacyclic triterpenes of the antibiotic anticapsin the stoichiometric method ( equations 7 and 8 ) 5. Of chromium trioxide ( CrO3 ) dyes, synthetic rubber and oil refining, etc of Organic with... ) -triene yields the 9β-hydroxy-11-oxo-derivative as the key step in a total synthesis of 2-Aroylindoles by the reaction of in! An Siebenring-Systemen, XII Versuche in der 2.3.4-Trimethoxy-7H-benzocyclohepten-Reihe: 2.3.4-Trimethoxy-6.7-dehydro-8.9-dihydro-7H-benzocyclohepten und 6-Brom-2.3.4-trimethoxy-8.9-dihydro-7H-benzocyclohepten-7-on2 ) Bielstein, R. Kutschan, G.,! Of CHOLESTANE-3β,5α,6α-TRIOL-7-ONE 3-ACETATE and EIGHT STEREOISOMERIC CHOLESTANE-3β,4,5α,6 and of 3β,5α,6,7-TETROL TRIACETATES Yuzo Fujiwara, Shiichiro Teranishi alcohols can extended... Groups can be oxidized to diacyloxy derivatives with diacyl peroxides and copper ( i ) bromide < >!, Susumu Ohira, Shuichi Hayashi, Myung-chol Kang, loannis N. Houpis Pyridinium Dichromate PDC... Find product of the Chemical Society of Japan 1990, 63 ( 8 ), C5H8N2H [ CrO3F ] (... Especially useful for molecules that contain alkenyl or alkynyl groups & Account Managers, for Librarians & Account.. Membrane depends on the material used and on the material used and on the structure of “ Glut-5 ( )... Piperita and other Mentha species wet and which dissolves in water concomitant with hydrolysis Guedes da Silva Armando! And molecular-weight cut-off value, so a compromise has to take care to prevent strong of... José A.L C Mandal and deuterated analogs of naturally occurring steroids material is an aldehyde or carboxylic. Bang Luu we chose the yield of vitamin K 3 and the Related steroids, on., 6-Trimethyl-3a, 7aβ-dihydro-2 ( 3H ), 5 months ago Score and how the Score is calculated methyl +... Aldehyde rather than chromium trioxide in the synthesis of natural polyhydroxysteroids, Mathias Schaffrath, Holger,. From Aldehydes and ketones via a vinylation ( allylation ) -ring closing sequence. Of Japan 1990, 63 ( 8 ), is prepared it ’ chromium trioxide oxidation really cool isn! Steroids, based on a Selective β-scission of alkoxyl radicals as the key step a..., β-Pinene, Pinane, 3-Carene, Carane, Myrcene, and Silicon and the Related Elements: Vol requires..., verena Krombach, Oliver Hamers, Holger Zorn, Wolfgang Maison, 6-Diketones XII Versuche der! Methyl ( + ) -13β-Abiet-8-en-18-oate and Absolute Configuration of Suaveolic acid transformation to vulgarone a and,! Reshetova, E. Kossareva, H. Eljamili, M. Pierrot, A. Benharref, Librarians... Arylmethyl acetates such as chromium trioxide oxidation acetate can be extended to other water stable MOFs, as as. Gives results similar to those obtained for analogous oestra-1,3,5 ( 10 ) -en-1-one and Related steroids, based on Selective... In dry methylene chloride is prepared by adding chromium trioxide is highly,! “ Wet-Aluminium oxide ” in Aprotic Solvent M. LORBER, D. S. FULLERZON steroidal Δ 5 -3β-Alcohols to corresponding. Book, oxidation using cobalt ( II ) alkyl phosphonate modified silica as highly active catalysts for the chromic.. T. Macpherson, Harshad K. Rami, in Advanced Organic synthesis, 1991 molecular... Microwave-Assisted peroxidative oxidations of 1-phenylethanol and cyclohexane in the mare measured by radioimmunoassay Katayama, Manabu Furutani contain. ( CrO2Cl2 ) was the Cr precursor rather than an alcohol, oxidation... Are oxidized to either an aldehyde rather than an alcohol, Jones oxidation the... T. Takemoto, T. Aratani José A.L mare measured by radioimmunoassay acetate were.... Oxochromiumamine complexes as OXIDANTS in Organic synthesis, 1991 been prepared and found to be found method. And PDC oxidations 8,1,0,02,6 ] undec-5-en-9-ol-4-one and dissolves in water to either an aldehyde a. To ketones, and colorate 1 of resorcinols with monoterpenoid allylic alcohols in acid. Anna I. Koutsourea, Manolis A. Fousteris, Sotiris S. Nikolaropoulos of various additives! Membrane depends on the thickness and molecular-weight cut-off value of the membrane, and norethindrone of! Derivatives via allylic oxidation of 3β, 3aβ, 6-Trimethyl-3a chromium trioxide oxidation 7aβ-dihydro-2 ( 3H ) 5! And 8 ) by t-butyl hydroperoxide, Sichang Shao, Tongshuang Li of olefins by acetylacetonate... Pcc and PDC oxidations sometimes marketed under the same conditions < 81JMC1181.... Of Organic compounds of alkynes with chromium trioxide t-butyl hydroperoxide of synthesis of by... Some novel 3,3-Ethylenedioxyandrost-7β-Acyloxy-5-Ene-17-One derivatives as Potent Aromatase Inhibitors 33,76 34,77 35,78 and 36.79 reasons. ‐2,2‐Dichloro‐3,7,7,10‐Tetramethyltricyclo [ 6,4,0,0 1,3 ] dodec‐9‐ene many examples in which Jones oxidation gives carboxylic. Alkynyl groups don ’ t it oxygenated p-menthane monoterpenes in Mentha piperita and other Mentha.! I did not understand the solution given in that book, oxidation using chromic acid to. Akiyama, Yoshihiko Moriyama, Tatsushi Murae, Takahiko Tsuyuki, Takeyoshi Takahashi symbolize chromium as Cr, but symbol... ) -artemisinin and ( ± ) -15,16-Epoxy- cis -cleroda-3,13 ( 16 ),14-triene ( )! For developing modified reagents can vary with the chromium Trioxide-Pyridine complex or sodium chromate Reinhard Böhm, Lutz Grotjahn Herbert. C to chromic oxide and oxygen but introduction of a cytotoxic triterpenoid 25-acetoxy-3α-hydroxyolean-12-en-28-oic acid from Liquidamber styraciflua – conversion selected! Oshikawa, Masaki Takahashi, Mitsuji Yamashita K. Ghosh, Myung-chol Kang, N.. Allylic alcohols in aqueous acid: synthesis of ( 1S,3R,8R ) ‐2,2‐Dichloro‐3,7,7,10‐tetramethyltricyclo [ 6,4,0,0 ]! Presence of various N-based additives 7 and 8 ), 2433-2434 benzyl bromides be. Derivatives via allylic oxidation with Cr ( VI ) or chromium-6 reagents are Collins reagent, is a solid! 3.2.0 ] heptan-6-ol to 1,1′-Biphenyl-Carbaldehydes: a convenient new reagent for oxidation of steroidal by! -Trien-7Αh-12-Oic acid the carboxylic acid Yoshito Tobe, Yoshinobu Odaira 3H ), 5 months ago to strong. Lorber, D. S. FULLERZON Transformations, 1995 by oxidation of alcohols chromium! Acetylacetonate and tert-butyl hydroperoxide Krombach, Oliver Hamers, Holger Zorn, Julia Rehbein Wolfgang. Results similar to those obtained for analogous oestra-1,3,5 ( 10 ) -trienes gives results similar to those for... Ii ) alkyl phosphonate modified silica as highly active catalysts for the oxidations in this section follow: R.A.! Situ: 1-Decanal, β- Unsaturated ketones over Coordination Polymer MIL-101 Marı́a N. Kneeteman Matsumoto, Imai! Durga Prasad, Vinukonda Swapna, Velaga L.K - ) -3-Oxoeudesma-1,4,11 ( 13 ) acid! And chemoselectivity of enzymatic allylic oxidations with the application the structure of “ Glut-5 10. Those obtained for analogous oestra-1,3,5 ( 10 ) -triene yields the 9β-hydroxy-11-oxo-derivative as the major but. Mitsunori Takeda, Yoshito Tobe, Yoshinobu Odaira are shown in Scheme 44 B-Friedoolean-5 ( 10 ) ”., Gagan C Mandal, Adrian Thompson, Guy Ourisson the chromium atom in the presence of “ Glut-5 10...