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Furan Ring Opening — Isocoumarine Ring Closure: A Recyclization Reaction of 2-Carboxyaryldifurylmethanes.

✍ Scribed by Vladimir T. Abaev; Artem S. Dmitriev; Andrey V. Gutnov; Sergey A. Podelyakin; Alexander V. Butin

Publisher: John Wiley and Sons
Year: 2007
Weight: 29 KB
Volume: 38
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.200708139

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## Abstract magnified image A new synthetic approach to furo[2′,3′:3,4]cyclohepta[1,2‐__b__]indolium chlorides is elaborated starting from 2‐acetylaminoaryldifurylmethanes or 2‐aminoaryldifurylmethanes under treatment with methanolic HCl solution. The reaction proceeds in three steps: recyclizatio