作者:Karen Goodall、Andrew F. Parsons
DOI:10.1016/0040-4020(96)00288-8
日期:1996.5
Treatment of serine-derived N-(α-haloacetamido)dehydroalanine derivatives with tributyltin hydride in boiling benzene or toluene afforded pyroglutamates in 47–84% yield. The radical cyclisation reaction, which proceeded regioselectively in a disfavoured 5-endo-trig manner, was found to be most efficient when dichloro- and trichloroamides were employed as starting materials.
在沸腾的苯或甲苯中用氢化三丁基锡处理丝氨酸衍生的N-(α-卤代乙酰胺基)脱氢丙氨酸衍生物可得到焦谷氨酸,收率为47-84%。当以二氯和三氯酰胺为起始原料时,发现自由基环化反应以不利的5-内-trig方式区域选择性地进行,是最有效的。