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■ Efficient Synthesis of Oligo-N-methylpyrrolecarboxamides and Relateed Compounds

Eiji Nishiwaki, Shigeaki Tanaka, Hideaki Lee, and Masayuki Shibuya*

*Faculty of Pharmaceutical Sciences, University of Tokushima, Sho-machi 1, Tokushima 770-8505, Japan

Abstract

1-Methyl-4-nitro-2-trichloroacetylpyrrole 5, a new precursor for the syntheses of oligo-N-methylpyrrolecarboxamide antibiotics and their analogues, was prepared with facility. The versatility of 2 was demonstrated by the syntheses of oligopeptides 16-19. 1-Methyl-4-nitro-2-trichloroacetylimidazole 8 was also prepared for a precursor of oligo-N-methylimidaezolecarboxamidds.