indolizinone and quinolizinone products are obtained in the thiourea-catalyzed cyclization of tryptamine-derived hydroxylactams. Substituent and counterion effect studies point to a novel mechanism of catalysis involving rate-limiting anion abstraction and binding by the thiourea.
在
硫脲催化的
色胺衍生的羟基内
酰胺的环化中获得高度对映体富集的
吲哚嗪
酮和喹嗪
酮产物。取代基和反离子效应研究指出了一种新的催化机制,涉及限速阴离子提取和
硫脲结合。