Novel N-(2-benzo[b]thienyl)iminophosphoranes and their use in the synthesis of benzo[b]thieno[2,3-b]pyridines
作者:Carlo Bonini、Maurizio D'Auria、Maria Funicello、Gianfranco Romaniello
DOI:10.1016/s0040-4020(02)00324-1
日期:2002.4
Novel N-(2-benzo[b]thienyl)iminophosphoranes react with α,β-unsaturated aldehydes and ketones to give benzo[b]thieno[2,3-b]pyridines in an aza-Wittig/electrocyclic-ring closure process. The diphenylmethyliminophosphorane reacts with aromatic and heteroaromatic aldehydes to give iminic products: upon UV irradiation, two imines furnish cyclization products in acceptable yields.
新型的N-(2-苯并[ b ]噻吩基)亚氨基正膦与α,β-不饱和醛和酮反应生成苯并[ b ]噻吩并[2,3- b ]吡啶,并经氮杂-维蒂希/电环封闭。二苯基甲基亚氨基膦烷与芳族和杂芳族醛反应生成亚胺基产物:在紫外线照射下,两个亚胺以可接受的收率提供环化产物。