3, 3'-Carbonylbis [5-phenyl-1, 3, 4-oxadiazole-2 (3H)-thione]: A novel, reactive, and versatile condensing agent for amide, ester, thiol ester, urea, carbonate, polyamide …

Y Saegusa, T Watanabe, S Nakamura

Index: Saegusa, Yasuo; Watanabe, Tatsushi; Nakamura, Shigeo Bulletin of the Chemical Society of Japan, 1989 , vol. 62, # 2 p. 539 - 544

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Citation Number: 9

Abstract

A novel condensing agent, 3, 3′-carbonylbis [5-phenyl-1, 3, 4-oxadiazole-2 (3H)-thione](3), was readily prepared by the reaction of 5-phenyl-1, 3, 4-oxadiazole-2 (3H)-thione with trichloromethyl chloroformate in benzene. The reagent 3 was found to be very useful for the one-pot or direct preparation of amide, ester, thiol ester, urea, and carbonate under mild conditions. The one-pot or direct polycondensation of several dicarboxylic acids with ...