Singlet oxygen reactions of 3-methoxy-2-pyrrole carboxylic acid tert-butyl esters. A route to 5-substituted pyrrole precursors of prodigiosin and analogs
作者:Harry H. Wasserman、Mingde Xia、Jianji Wang、Anders K. Petersen、Michael Jorgensen、Patricia Power、Jonathan Parr
DOI:10.1016/j.tet.2004.05.053
日期:2004.8
Reaction of the tert-butyl ester of 3-methoxy-2-pyrrole carboxylic acid with singlet oxygen yields a peroxidic intermediate which undergoes coupling with a range of nucleophiles to yield 5-substituted pyrroles. Among these products are α,α′-bipyrroles which serve as precursors of prodigiosin, including A-ring substituted analogues.