Practical synthesis of urea derivatives

Details Practical synthesis of urea derivatives Practical synthesis of urea derivatives

1997-09-15

1999-07-20

Kumar, Shailendra

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544390, 544391, 546226, 548190, 548197, 548198, 548538, 558417, 564 48, 564 52, 564 56, C07D21304, C07C27528

Patent

active

059257628

ABSTRACT:
##STR1## A very mild and efficient approach for the synthesis of ureas is described. Phenyl carbamates were used as intermediates for the preparation of N,N'- substituted ureas. The carbamates were treated with an approximate stoichiometric amount of amine in dimethyl sulfoxide at ambient temperature, generating the ureas in high yield. The reaction was simple, safe, fast, inexpensive, and amenable to large scale production of the product.

REFERENCES:
patent: 3161676 (1964-12-01), Adams
patent: 5420164 (1995-05-01), Mishina et al.

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