Stratmann, Oliver; Hoppe, Dieter; Froehlich, Roland, Advanced Synthesis and Catalysis, 2000, vol. 342, # 8, p. 828 - 831
作者:Stratmann, Oliver、Hoppe, Dieter、Froehlich, Roland
DOI:——
日期:——
The Configurational Stability of an Enantioenrichedα-Thiobenzyllithium Derivative and the Stereochemical Course of Its Electrophilic Substitution Reactions; Synthesis of Enantiomerically Pure, Tertiary Benzylic Thiols[1,2]
The lithium compound (S)-7, formed by deprotonation of the (S)-S-1-phenylethyl thiocarbamate (S)-10, is configurationally stable at -70 degrees C. Even at elevated temperatures it racemizes only very slowly. It represents the first essentially enantiopure alpha-thiocarbanion derivative and can be utilized in asymmetric synthesis. Most electrophiles (except proton acids) add to (S)-7 with complete stereoinversion