摘要:
[GRAPHICS]An efficient, unified approach to chiral, protected beta-hydroxy gamma-amino and alpha-hydroxy beta-amino acids derived from Boc-L-leucine has been accomplished on the basis of the oxazaborolidine-controlled, stereoselective reduction of 1-trialkylsilyl acetylenic ketones; stereoselectivity in the reduction step has shown strong dependence upon C(1) substitution.