in situ activation of amides with trifluoromethanesulfonic anhydride, followed by double addition of alkynyllithium reagents at a concentration of 0.5 mol·L–1 in dichloromethane. This constitutes an extension of the method of direct reductive bisalkylation of amides that allows both employing alkynyllithium reagents as the first-addition nucleophiles and incorporating an alkynyl group as the first-introduced
已经建立了从叔酰胺和内酰胺直接和灵活地合成带有氮杂-季碳的3-
氨基-1,4-二炔的有效而温和的方案。一锅法包括用
三氟甲磺酸酐原位活化酰胺,然后在
二氯甲烷中两次添加浓度为0.5mol·L –1的炔基
锂试剂。这构成了酰胺直接还原性双烷基化方法的扩展,该方法允许既使用炔基
锂试剂作为第一加成亲核试剂,又引入炔基作为第一引入的亲核基团。