Bulletin of the Chemical Society of Japan p. 539 - 544 (1989)
Update date:2022-09-26
Topics:
Saegusa, Yasuo
Watanabe, Tatsushi
Nakamura, Shigeo
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 amid, ester, thiol ester, uea, and carbonate under mild conditions.The one-pot or direct polycondensation of several dicarboxylic acids with aromatic diamines and of aromatic diamines using 3 proceeded smoonthly at ambient temperature to produce high-molecular-weight polyamides and polyureas, respectively.
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