Reduction of oximes of .ALPHA.-substituted .BETA.-ketoesters with sodium cyanoborohydride: Stereoselective synthesis of 3,4-cis-substituted azetidin-2-ones.
Reduction of oximes of .ALPHA.-substituted .BETA.-ketoesters with sodium cyanoborohydride: Stereoselective synthesis of 3,4-cis-substituted azetidin-2-ones.