Furan ring recyclization in 2-furfurylthieno[2,3-<i>b</i>]pyridines: An intramolecular N-alkylation of pyrrole ring under acid conditions
作者:Darya Yu. Kosulina、Vladimir K. Vasilin、Tatyana A. Stroganova、Tatyana Ya. Kaklyugina、Gennady D. Krapivin
DOI:10.1002/jhet.311
日期:——
The preparation of new 3‐amino‐2‐furfurylthieno[2,3‐b]pyridines (1a, 1b, 69–80%) is described. Subsequent acidic rearrangement of 1a, 1b afforded two new annulated heterocyclic products, 5a, 5b, pyrrolothieno[2,3‐b]pyridines (45–74%), and 6, pyridothieno[2,3‐b]pyrrolizine (22%), depending on reaction conditions. J. Heterocyclic Chem., (2010).
描述了新的3-氨基-2-糠基噻吩并[2,3- b ]吡啶(1a,1b,69-80%)的制备方法。随后1a和1b的酸性重排提供了两个新的环状杂环产物5a,5b,吡咯并噻吩并[2,3- b ]吡啶(45-74%)和6,吡啶并噻吩并[2,3- b ]吡咯并嗪(22%) ,取决于反应条件。J.杂环化学。(2010)。