lithiated exclusively at the 2-position. The tertiary carbanions can be trapped with a variety of electrophiles. This chemistry was used for the synthesis of a potent NK1 ligand (Ki = 0.3 nM). The bioactive configuration at the piperidine quaternary center was determined by X-ray analysis to be (S).
与在6-位发生的N -Boc-2-烷基
哌啶的
锂化不同,N -Boc-
2-苯基哌啶和N -Boc-
2-苯基吡咯烷可以仅在2-位被
锂化。第三碳负离子可以被多种亲电试剂捕获。该
化学方法用于合成有效的NK 1
配体(K i = 0.3 nM)。通过X射线分析确定在
哌啶季中心的
生物活性构型为(S)。