The first isolation of unsubstituted porphyrinogen and unsubstituted 21-oxaporphyrinogen by the ‘3+1’ approach from 2,5-bis(hydroxymethyl)pyrrole and tripyrrane derivatives
作者:Shozo Taniguchi、Hikaru Hasegawa、Shoko Yanagiya、Yusuke Tabeta、Yoshiharu Nakano、Masahiko Takahashi
DOI:10.1016/s0040-4020(01)00059-x
日期:2001.3
The treatment of 2,5-bis(hydroxymethyl)pyrrole or 2,5-bis(hydroxymethyl)furan with pyrrole in the presence of hydrochloric acid gave tripyrrane and 2,5-bis(2-pyrrolylmethyl)furan in 58-61% yield, which afforded the simplest porphyrinogen (hexahydroporphine) and 21-oxaporphyrinogen by the '3+1' approach in 14 and 11% yields, respectively. 21-Oxaporphyrinogen has been shown to adopt a 1,2-alternated conformation in the solid state by X-ray crystallography. (C) 2001 Elsevier Science Ltd. All rights reserved.