作者:Anil Kumar、Summon Koul、Tej K. Razdan、Kamal K. Kapoor
DOI:10.1016/j.tetlet.2005.11.043
日期:2006.1
A new, convenient, efficient and cost-effective one-pot solid supported synthesis of 2,4,6-triarylpyridines from benzylideneacetophenones and urea, thiourea or their derivatives, using Bi(III) nitrate–Al2O3 is described. The reaction seems to proceed via β-oxygenation of Bi(III)-enolized benzylideneacetophenone followed by Michael addition, heteroannulation with simultaneous retro aldol disproportionation
描述了一种新的,方便,有效且具有成本效益的一锅固支持的硝酸Bi(III)-Al 2 O 3,由亚苄基苯乙酮和尿素,硫脲或其衍生物合成2,4,6-三芳基吡啶。该反应似乎是通过对Bi(III)烯丙基化的亚苄基苯乙酮进行β加氧,然后进行迈克尔加成,同时同时逆向羟醛歧化和随后的催化氧化和脱水而进行的。