Hh. Wasserman et al., SINGLET OXYGEN IN SYNTHESIS - FORMATION OF D,L-ISOCHRYSOHERMIDIN AND MESO-ISOCHRYSOHERMIDIN FROM A 3,3'-BIPYRROLE PRECURSOR, Tetrahedron, 53(26), 1997, pp. 8731-8738
A synthesis of the d,l and meso forms of isochrysohermidin 3 is outlin
ed which employs the singlet oxygen oxidation of pyrroles as the key s
tep. The bipyrrole precursor 8 was synthesized from a 5-hydroxy monopy
rrole which, in turn, was prepared by addition of methylamine to a vin
yl vicinal tricarbonyl. (C) 1997 Published by Elsevier Science Ltd.