Abstract
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 cases. The reaction is compatible with other reported dipyrromethane syntheses and could be applied for the construction of unusual porphyrins.
Original language | English |
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Pages (from-to) | 4138-4141 |
Number of pages | 4 |
Journal | Tetrahedron Letters |
Volume | 49 |
Issue number | 26 |
DOIs | |
State | Published - 23 Jun 2008 |
Bibliographical note
Funding Information:This work was supported by a grant from the Korea Science and Engineering Foundation (KOSEF) grant (R01-2006-000-10001-0) funded by the Korean government (MOST). Vascular System Research Center (VSRC) and Central Instrumentation Facility at KNU are acknowledged for support.