LiAlH4 previously treated with 2 equivalents of (R)-(−)-2-(2-iso-indolinyl) butan-1-ol (a readily available reagent) reduced 2-chloro and 2,4-dimethyl benzophenones into the corresponding benzhydrols with 100% enantiomeric excess. Other examples of ketone reductions are given.
Touet, Joel; Baudouin, Sylvie; Brown, Eric, Journal of Chemical Research, Miniprint, 1996, # 5, p. 1251 - 1266
作者:Touet, Joel、Baudouin, Sylvie、Brown, Eric
DOI:——
日期:——
Asymmetric Michael additions of Grignard reagents to cinnamamides deriving from N-alkyl (R)-(−)-2-aminobutan-1-ol
作者:Joe¨l Touet、Sylvie Baudouin、Eric Brown
DOI:10.1016/s0957-4166(00)82287-9
日期:1992.5
Reaction of cinnamoyl chloride with various N-alkyl derivatives of (R)-(−)-2-aminobutan-1-ol (a readily available reagent) afforded the corresponding cinnamamides. Michael additions of Grignardreagents to the latter, followed by acidic hydrolysis, yielded optically active β-phenylalkanoic acids whose ee most generally were in the range 72–100%.