is reported that occurs by the three-component coupling of environmentally friendly and large-tonnage industrial feedstock 2-bromo-3,3,3-trifluoropropene (BTP), aldehydes, and sulfonyl hydrazides. This highly regioselective three-component reaction is metal-free, catalyst-free, and operationally simple and features mild conditions, a broad substrate scope, high yields, and valuable functional group
据报道,通过环境友好的大吨位工业原料
2-溴-3,3,3-三氟丙烯(
BTP),醛和磺酰
肼的三组分偶联,可以实现3-三
氟甲基吡唑合成的通用和实用策略。这种高度区域选择性的三组分反应不含
金属,不含
催化剂,操作简单,具有条件温和,底物范围广,收率高和有价值的官能团耐受性。值得注意的是,反应可以在100 mmol的规模上进行,并顺利提供了
塞来昔布,马伐昔布,SC-560和AS-136A合成的关键
中间体。初步机理研究表明,此转化过程涉及1,3-
氢原子转移过程。