# US 5,710,279 A · N-acyloxyalkyl-carboxamides and process for their preparation

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- Number: US 5,710,279 A
- Document ID: US5710279A
- Status: Granted
- Kind: A
- Application number: 08/708,441
- Filed: 1996-09-05
- Granted: 1998-01-20
- Earliest claimed: 1994-03-04
- Assignees: Bayer Aktiengesellschaft
- Inventors: Reinhard Lantzsch; Werner Lindner
- Web page: https://patentgrep.com/patent/US5710279A

## CPC

- C07C 233/18: having the carbon atom of the carboxamide group bound to a hydrogen atom or to a carbon atom of an acyclic saturated carbon skeleton
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

The invention provides novel N-acyloxyalkyl-carboxamides of the general formula (I): ##STR1## in which R.sup.1 is alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, arylalkyl or heteroarylalkyl, each of which is optionally substituted, R.sup.2 is optionally substituted alkyl and R.sup.3 is hydrogen, halogen or optionally substituted alkyl, in the isolated and pure form, and a process for their preparation.

## Claims

### Claim 1

A process for the preparation of an N-acyloxyalkyl-carboxamide of the formula (I): ##STR23## in which R.sup.1 is alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkylalkyl, arylalkyl or heteroarylalkyl, each of which is optionally substituted,
R.sup.2 is optionally substituted alkyl and
R.sup.3 is hydrogen, halogen or optionally substituted alkyl, which comprises reacting an imine of the formula ##STR24## with an anhydride of the formula
(R.sup.3 --CH.sub.2 --CO).sub.2 O (III)
in the presence of a base and optionally in the presence of a diluent, at a temperature between -30.degree. C. and +50.degree. C., and isolating the compound of the formula (I).