Enantioconvergent Synthesis of (−)-(<i>2R</i>,5<i>S</i>)-1-Allyl-2,5-dimethylpiperazine, an Intermediate to δ-Opioid Receptor Ligands
作者:James W. Janetka、M. Scott Furness、Xiaoyan Zhang、Andrew Coop、John E. Folk、Mariena V. Mattson、Arthur E. Jacobson、Kenner C. Rice
DOI:10.1021/jo0300385
日期:2003.5.1
A convenient, high-yield enantioconvergent synthesis of (-)-1-allyl-(2S,5R)-dimethylpiperazine from trans-2,5-dimethylpiperazine has been developed. This compound is an important intermediate in the synthesis of delta-opioid receptor ligands. The process allows for the laboratory preparation of 100 g quantities of this enantiomerically pure diamine without chromatography. The key steps in the sequence
已经开发了由反式-2,5-二甲基哌嗪方便,高产的对映体合成(-)-1-烯丙基-(2S,5R)-二甲基哌嗪的方法。该化合物是δ-阿片受体配体合成中的重要中间体。该方法允许在不进行色谱的情况下实验室制备100 g量的这种对映体纯的二胺。序列中的关键步骤是使用相对便宜的拆分剂进行高效旋光拆分,然后将不需要的(+)-对映异构体互变为所需的(-)-对映异构体。