Oligopyrrole Synthesis by 1,3‐Dipolar Cycloaddition of Azomethine Ylides with Bissulfonyl Ethylenes

Abstract

One by one or two by two: In a general approach to the iterative construction of oligopyrroles, the cycloaddition of azomethine ylides derived from pyrrolyl α-iminoesters with 1,2-bis(phenylsulfonyl)ethylene is followed by the elimination of the sulfonyl groups in situ under basic conditions. This strategy is amenable to the introduction of one or two pyrrole units in each iterative cycle. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z703258_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.