Synthesis of Enantiopure α,α-Disubstituted Amino Acids from the Asymmetric Strecker Reaction Products of Aldehydes
作者:Dawei Ma、Ke Ding
DOI:10.1021/ol0061891
日期:2000.8.1
Treatment of the enolates of 4 generated from the asymmetric Strecker reaction products with alkyl halides or aldehydes provided the corresponding functionalized products with high diastereoselectivity. Deprotection of these products afforded the corresponding enantiopure alpha,alpha-dialkyl amino acids.
Asymmetric synthesis of α,α-disubstituted amino acids by diastereoselective functionalization of enantiopure phenyloxazinones, derivatives of asymmetric Strecker reaction products of aldehydes
作者:Ke Ding、Dawei Ma
DOI:10.1016/s0040-4020(01)00502-6
日期:2001.7
Esterification of the asymmetric Strecker reaction products of a suitable aldehyde and (R)-phenylglycinol followed by lactonization and alkylation provides chiral oxazinones 5. Treatment of the enolates of 5 with active alkyl halides, or aldehydes provided the corresponding functionalization products with high diastereoselectivity. The configuration of newly created quaternary carbon is S for the products