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.
3-甲氧基-2-吡咯羧酸的叔丁基酯与单线态氧的反应产生了过氧化物中间体,该过氧化物中间体与一系列亲核试剂偶合以产生5-取代的吡咯。在这些产物中,有α,α′-联吡咯,其是作为Prodigiosin的前体,包括A环取代的类似物。