摘要:
Polycitone B (2) was obtained in four steps from pyrrole dicarboxylic acid 3, including Friedel-Crafts reaction of the corresponding acid chloride with anisole. The conversion of 2 into polycitone A(1) was achieved in two steps via Mitsunobu alkylation of the pyrrolic NH groups. The synthesis of polycitone A proceeds in 18% overall yield and offers the possibility of varying the subsituents on the pyrrole ring.