Patent ID: 6207828
Filing Date: 2001-03-27
Classification: C07C

Abstract:
A process to prepare a compound of formula (I) by the reaction of a trihaloacetyl compound of formula (II) with an acetal of formula (III) in the presence of an organic acid and an optional solvent ##STR11##whereinA is an oxygen atom or a sulfur atom,B is R, OR, N(R).sub.2 or SR,R is a hydrogen atom, alkyl, haloalkyl, alkenyl, alkynyl, phenyl or phenyl substituted with up to three substituents independently selected from halo, alkyl and haloalkyl or phenalkyl or phenalkyl substituted on the phenyl ring with up to three substituents independently selected from halo, haloalkyl and alkyl,R.sup.1 and R.sup.2 are both alkyl or alkenyl, or together with the nitrogen atom to which they are attached form 4-morpholinyl, 1-piperidinyl, 1-pyrrolidinyl, thiomorpholin-4-yl, 1-pyrrolyl or 1-imidazolyl,R.sup.3 and R.sup.4 are both alkyl, cycloalkyl, benzyl or phenethyl, or together with the oxygen atoms to which they are attached form 1,3-dioxan-2-yl, 1,3-dioxolan-2-yl or catech-2-yl,X is fluoro or chloro, andthe organic acid is formic, acetic, trifluoroacetic, propionic, benzoic, toluic or phenylacetic.