An efficient single pot route is presented involving the use of 0, N-perhydro 1,3-heterocycles as carbonyl equivalents for the synthesis of 5-substituted dipyrromethanes, 5,10-disubstituted tripyrranes and bis(heterocyclyl)methanes. (c) 2005 Elsevier Ltd. All rights reserved.
Direct alkylation of pyrrole with vinyl substituted aromatics: versatile precursors for the synthesis of porphyrinoid macrocycles
作者:Seong-Jin Hong、Seung-Doo Jeong、Jaeduk Yoo、Jong Seung Kim、Juyoung Yoon、Chang-Hee Lee
DOI:10.1016/j.tetlet.2008.04.119
日期:2008.6
5-Substituted dipyrromethane analogues (8), (23) and (25) were synthesized by the reaction of 2-vinylpyrroles, 2-vinylthiophene or 2-vinylbenzenes with excess pyrrole in the presence of Lewis acids. Accordingly, tripyrromethane analogues could be obtained by starting with 2,5-divinyl thiophene or 2,6-divinylbenzenes. The reaction usually gave moderate yields and catalyst-dependent was seen in some