Lewis Acid-Catalyzed Synthesis of Benzofurans and 4,5,6,7-Tetrahydrobenzofurans from Acrolein Dimer and 1,3-Dicarbonyl Compounds
作者:Wenbo Huang、Jing Xu、Changhui Liu、Zhiyan Chen、Yanlong Gu
DOI:10.1021/acs.joc.9b00270
日期:2019.3.1
3-Disubstituted benzofurans were synthesized from acrolein dimer and 1,3-dicarbonyl compounds by using N-bromosuccinimide as an oxidizing agent. The method was used to synthesize two commercial drug molecules, benzbromarone and amiodarone. The proposed mechanism of the reaction involves a N-bromosuccinimide (NBS)-assisted autotandem catalysis with Lewis acid catalyst. To proof the proposed mechanism
N-溴代琥珀酰亚胺为氧化剂,由丙烯醛二聚体和1,3-二羰基化合物合成2,3-二取代苯并呋喃。该方法用于合成两个商业药物分子,苯溴马隆和胺碘酮。所提出的反应机理涉及使用路易斯酸催化剂的N-溴琥珀酰亚胺(NBS)辅助的自动串联催化。为了证明所提出的机理,成功地分离了中间体,该中间体可以转化为4,5,6,7-四氢苯并呋喃。