Synthesis of enantiomerically pure divinyl- and diallylcarbinols
作者:Bernd Schmidt、Holger Wildemann
DOI:10.1039/b200976e
日期:2002.4.9
Acylated oxazolidinones and bornane sultams can be cleaved to divinyl- and diallylcarbinols by treatment with vinyl- or allylmetal compounds. For the preparation of divinylcarbinols, acylated bornane sultams are the starting materials of choice, while for the preparation of diallylcarbinols acylated oxazolidinones and bornane sultams work equally well.
Asymmetric alkylation of N-acylsultams: A general route to enantiomerically pure, crystalline C(α,α)-disubstituted carboxylic acid derivatives
作者:Wolfgang Oppolzer、Robert Moretti、Silvia Thomi
DOI:10.1016/s0040-4039(01)93810-9
日期:1989.1
Successive treatment of acylsultams with nBuLi or NHMDS and primary alkyl halides, followed by crystallization, gave pure C(α)-alkylation products and, via their non-destructive cleavage, enantiomerically pure alcohols or carboxylic acids .