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 .
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.