STEREOCHEMISTRY OF SULFOXIDES BY ENZYMATIC OXYGENATION OF SULFIDES WITH RABBIT LIVER MICROSOMAL CYTOCHROME P-450
作者:Toshikazu Takata、Mayumi Yamazaki、Ken Fujimori、Yong Hae Kim、Shigeru Oae、Takashi Iyanagi
DOI:10.1246/cl.1980.1441
日期:1980.11.5
Asymmetric induction and diastereomeric ratio in the enzymatic oxygenation of various sulfides to the corresponding sulfoxides with hepatic mirosomal cytochrome P-450 obtained from phenobarbital pretreated rabbit were investigated in comparison with those of nonenzymatic oxidation with m-chloroperbenzoic acid and sodium metaperiodate. While substantial asymmetric inductions were observed in the sulfoxides formed by the enzymattc oxygenations, diastereomeric ratios of the sutfoxides formed were also quite different from those obtained by oxidation with m-chloroperbenzoic acid and sodium metaperiodate.
Intermolecular Stereoselective Pummerer Reactions of 4-(<i>p</i>-Chlorophenyl)thiane 1-Oxides and<i>trans</i>-1-Thiadecalin 1-Oxides and 2-Thiadecalin 2-Oxides with Acetic Anhydride
18O-labeled sulfoxide revealed the reaction to be an intermolecular rearrangement, while the kinetic experiment with α-deuterated 4-(p-chlorophenyl)thiane 1-oxides gave sizable values of kinetic isotope effect, i.e., 2.8 for the cis isomer and 3.4 for the trans isomer. In the reaction of 4-arylthiane 1-oxides with acetic anhydride, the thermodynamically controlled product is axial 2-acetoxy-4-(p-chlorophenyl)thiane
Enzymatic Oxygenation of Sulfides with Cytochrome P-450 from Rabbit Liver. Stereochemistry of Sulfoxide Formation
作者:Toshikazu Takata、Mayumi Yamazaki、Ken Fujimori、Yong Hae Kim、Takashi Iyanagi、Shigeru Oae
DOI:10.1246/bcsj.56.2300
日期:1983.8
Stereochemistry of enzymatic oxygenations of various diaryl, dialkyl and aryl alkyl sulfides to the corresponding sulfoxides with hepatic microsomes obtained from phenobarbital pretreated rabbit was investigated in comparison with those of nonenzymatic oxidations. Relative reactivity of the sulfides in the enzymatic oxygenation, based on the yields of the sulfoxides and the amount of oxygen absorption, depends
Cerny, Mirko; Trka, Antonin, Collection of Czechoslovak Chemical Communications, 1983, vol. 48, # 6, p. 1749 - 1758
作者:Cerny, Mirko、Trka, Antonin
DOI:——
日期:——
13C13C vicinal coupling constants of sulphonium cations
作者:G. Barbarella、P. Dembech
DOI:10.1002/mrc.1270160305
日期:1981.7
AbstractThe 13C13C vicinal coupling constants of cyclic sulphonium cations, with the labelled carbon bound to the positively charged sulphur atom, cannotbe related to the dihedral angle ϕ by a Karplus type correlation.