Novel C-S Bond Formation Through α’,β-Elimination of tert-Butyl Sulfoxonium Ylides: A Facile Approach to Chiral Sulfoxides
作者:Liao Jian、Wen-Hao Hu、Xiao-Yu Guan、Zhang-Qin Liu、Hao-Xi Huang、Li-Ping Yang
DOI:10.1055/s-0029-1217572
日期:2009.8
Chiral sulfoxides were prepared in excellent enantioselectivity through α′,β-elimination of the tert-butyl substituted sulfoxonium ylide intermediates in situ generated from diazoacetates and (R)-N-tert-butylsulfinyl aldimines in the presence of a copper(I) catalyst.
New Catalysts for Asymmetric Oxidation of Prochiral Sulfides Based on Vanadium Complexes with Levopimaric Acid Derivatives
作者:V. N. Konev、I. V. Eltsov、Z. P. Pai、T. B. Khlebnikova
DOI:10.1134/s0023158422060076
日期:2022.12
The formation of vanadium complexes with synthesized enantio- and diastereomerically pure polydentate tetrahydrosalicylidene ligands of the diterpene series was studied using UV, visible, and 51V NMR spectroscopy. The obtained catalystcomplexes were tested in the oxidation of prochiral sulfides with an aqueous 35% hydrogen peroxide solution. The studies on the oxidation of prochiral sulfides showed