Y. Saegusa, Tatsushi Watanabe, Shigeo Nakamura
Feb 1, 1989
Citations
0
Influential Citations
9
Citations
Journal
Bulletin of the Chemical Society of Japan
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 aromatic diamines and of aromatic diamines using 3 proceeded smoothly at ambient temperature to produce high-molecular-weight polyamides and polyureas, respectively.