Solvent and catalyst free ring expansion of indoles: a simple synthesis of highly functionalized benzazepines
作者:Manickam Bakthadoss、Polu Vijay Kumar、Tadiparthi Thirupathi Reddy、Duddu S. Sharada
DOI:10.1039/c8ob01825a
日期:——
open air conditions. The reaction was carried out in a solvent and under catalyst free conditions and the products are formed in very good yields. The reaction proceeds in a concerted fashion thus providing potentially bioactive benzazepines by ring expansion of a five-membered indole ring. It is also described that the ring contraction of seven-membered benzazepines in the presence of KOtBu base at room
通过在热和露天条件下使用各种取代的吲哚和二烷基乙炔二羧酸酯已经合成了高度官能化的苯并ze庚因。该反应在溶剂中和无催化剂的条件下进行,并且以非常高的收率形成产物。反应以一致的方式进行,因此通过五元吲哚环的扩环提供潜在的生物活性苯并ze庚因。还描述了在室温下在KO t Bu碱存在下七元苯并ze庚因的环收缩以非常好的收率平稳地提供了相应的3-烯基化的吲哚衍生物。