Process for preparing phenylisopropylurea compounds

Details Process for preparing phenylisopropylurea compounds Process for preparing phenylisopropylurea compounds

1984-11-16

1986-03-25

Warren, Charles F.

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

Organic compounds

Amino nitrogen containing

C07C12717

Patent

active

045785139

ABSTRACT:
A new and improved process for making phenylisopropylurea derivatives having the formula: ##STR1## wherein R.sup.1 is selected from hydrogen, halogen, alkyl, alkenyl, haloalkyl or R.sup.2 groups and R.sup.2 is selected from phenyl, alkyl-substituted phenyl alkoxy-substituted phenyl or haloalkyl-substituted phenyl is disclosed. The process comprises reacting a substituted urea of the formula: ##STR2## with an alkenyl aromatic compound of the formula: ##STR3## in a polar aprotic solvent, in the presence of an acid catalyst, preferably, sulfuric acid, substituted sulfonic acids or Lewis acids, and stirring the reaction mixture at a temperature of about 20.degree. to 80.degree. C. until formation of the precipitated phenylisopropylurea derivative is substantially complete.

REFERENCES:
patent: 3137697 (1964-06-01), Boswell et al.

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