作者:Dennis A. Parrish、Lon J. Mathias
DOI:10.1021/jo0160928
日期:2002.3.1
A variety of ring-opening reactions of pyroglutamic diketopiperazine at both the five-membered and six-membered rings is described. Mild, basic conditions facilitate nucleophilic attack by amines at the diketopiperazine carbonyls giving pyroglutamides in excellent yield. Reaction with nucleophiles under acidic conditions give bis-glutamate derivatives of 2,5-diketopiperazine (DKP). These reactions
描述了焦谷氨酸二酮哌嗪在五元和六元环上的各种开环反应。温和的碱性条件促进胺在二酮哌嗪羰基上的亲核攻击,从而以优异的收率得到焦谷氨酰胺。在酸性条件下与亲核试剂反应,可生成2,5-二酮哌嗪(DKP)的双谷氨酸衍生物。这些反应为商业焦谷氨酸中的焦谷酰胺和对称二酮哌嗪提供了简单的两步序列,并控制了反应条件,催化剂和亲核试剂对产物的控制。