Abstract The application of an allylic strain effect in boron enolates and asymmetric Michael-like addition/electrophilic bromination reactions is reported for the asymmetric synthesis of the individual isomers of unusual constrained amino acids. For β-substituted α-amino acids, all of the final optically pure products were identical to authentic samples, which provided further and unequivocal evidence
摘要报道了烯丙基应变效应在
硼烯醇化物和不对称迈克尔样加成/亲电
溴化反应中的应用,用于不对称合成个别受限
氨基酸的异构体。对于β-取代的
α-氨基酸,所有最终的光学纯产品都与真实样品相同,这为确认本报告中新方法的立体
化学控制的分配提供了进一步明确的证据。