General Method for Asymmetric Synthesis of α-Methylsulfinyl Ketones: Application to the Synthesis of Optically Pure Oxisuran and Bioisosteres
作者:H. El Ouazzani、N. Khiar、I. Fernández、F. Alcudia
DOI:10.1021/jo961038q
日期:1997.1.1
compounds led to some epimerization at sulfur. This loss of chirality was circumvented by reacting the alpha-lithio derivatives of the N,N-dimethylhydrazones derived from these ketones with either the (R)- or the (S)-methanesulfinate of diacetone D-glucose, to yield the corresponding alpha-(methylsulfinyl)methylhydrazones, with complete inversion of chirality at sulfur. Hydrolysis of the resulting