Haem d1: development of a new coupling procedure leading to the synthesis of isobacteriochlorins 1
作者:Richard L. Mackman、Jason Micklefield、Michael H. Block、Finian J. Leeper、Alan R. Battersby
DOI:10.1039/a700654c
日期:——
A new approach has been developed for construction of the western
and eastern lactams, e.g. 2 and 3, needed for synthesis of
isobacteriochlorins. It involves acylation of pyrroles with lactonic
acids to form ketones. These are then efficiently converted into the
desired lactams by a short sequence of reactions. All the steps are high
yielding and simple to carry out.