Regioselective Synthesis of Substituted Arenes via Aerobic Oxidative [3 + 3] Benzannulation Reactions of α,β-Unsaturated Aldehydes and Ketones
作者:Prabhakar Ramchandra Joshi、Sridhar Undeela、Doni Dhanoj Reddy、Kiran Kumar Singarapu、Rajeev S. Menon
DOI:10.1021/acs.orglett.5b00318
日期:2015.3.20
Facile conversion of α,β-unsaturated aldehydes and ketones into highly substituted arenes via a base-mediated, completely regioselective, air-oxidative [3 + 3] benzannulation reaction with readily available 4-sulfonylcrotonates or 1,3-bisphenylsulfonylpropene is reported. The reaction can also be carried out as a one-pot, three-component operation using 4-bromocrotonates, aryl sulfinates, and cinnamaldehyde
据报道,α,β-不饱和醛和酮可以通过碱介导的,完全区域选择性的,空气氧化的[3 + 3]苯并环乙烷反应与容易获得的4-磺酰基巴豆酸酯或1,3-双苯基磺酰基丙烯轻松地转化为高度取代的芳烃。该反应还可以使用4-溴巴豆酸酯,芳基亚磺酸酯和肉桂醛作为一锅三组分操作进行。这种开瓶,无金属的反应不需要无水溶剂,可以在温和的条件下进行,并使用大气中的氧气作为氧化剂,可提供高产率的3-(芳基磺酰基)苯甲酸酯。