Process for preparing carbamates, and intermediates therein

Details Process for preparing carbamates, and intermediates therein Process for preparing carbamates, and intermediates therein

1990-02-27

1993-02-23

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

560 29, 560 30, 560 31, 560 32, 564133, C07C27162

Patent

active

051891972

ABSTRACT:
The invention provides a process for the preparation of N-benzoylcarbamates of general formula ##STR1## wherein R.sup.1 represents a hydrogen atom, a halogen atom, a C.sub.1-4 alkyl group, a C.sub.1-4 alkoxy group or a trifluoromethyl group, R.sup.2 represents a halogen atom, a C.sub.1-4 alkyl group, a C.sub.1-4 alkoxy group or a trifluoromethyl group, R.sup.3 represents a hydrogen atom, a halogen atom, a methyl group or a trifluoromethyl group, and R represents a C.sub.1-8 alkyl group optionally substituted by one or more halogen atoms or a phenyl group optionally substituted by one or more substituents selected from halogen atoms and methyl groups, characterized by reacting an alkali metal salt of a benzamide of general formula ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 are as defined above, with a carbonate of formula

REFERENCES:
patent: 4457943 (1984-07-01), Becher et al.
patent: 4595533 (1986-06-01), Thompson

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