Two-step method for preparing cyclic ureas

Details Two-step method for preparing cyclic ureas Two-step method for preparing cyclic ureas

C - Chemistry, Metallurgy

07

D

C07D 273/08 (2006.01) C07D 245/02 (2006.01) C07D 273/00 (2006.01)

Patent

CA 2078353

A TWO-STEP METHOD FOR PREPARING CYCLIC UREAS (D#81,111-F) ABSTRACT OF THE DISCLOSURE Disclosed is a two-step method for the preparation of cyclic urea products which comprises: heating a diamine with urea in a mole ratio of about l at a temperature from about 120°C to 140°C until a mole of ammonia is liberated and slowly heating the intermediate with an alcohol or polyether solvent to a temperature from about 160°C to 200°C to produce the cyclic urea products. CLK:pg 81111.APP

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