Process for preparing cyclic urea derivatives

Details Process for preparing cyclic urea derivatives Process for preparing cyclic urea derivatives

1985-09-11

1986-10-14

Schwartz, Richard A.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544315, C07D23332

Patent

active

046174001

ABSTRACT:
A process for preparing a cyclic N,N'-dimethyl urea derivative by reacting a cyclic urea compound with formaldehyde, in a medium, in the presence of hydrogen and a hydrogenation catalyst. The reaction is carried out in the presence of a solid acid obtained by calcining sulfuric acid and aluminum oxide or sulfuric acid, phosphoric acid and aluminum oxide.

REFERENCES:
patent: 2422400 (1947-06-01), Farlow
Chemical Abstracts, 83:43789v (1975) [Yamamura, T., et al., Nippon Kagaku Kaishi, 1975, (3), 427-31].
Chemical Abstracts, 90:72186w (1979) [Jpn. Kokai, 78, 98, 965, 8/29/78].

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