Patent ID: 6291721
Filing Date: 2001-09-18
Classification: C07C

Abstract:
A process for the preparation of a 2-arylvinyl alkyl ether compound of the structural formula I ##STR64##whereinR is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 haloalkyl, C.sub.3 -C.sub.6 cycloalkyl or C.sub.3 -C.sub.6 halocycloalkyl;R.sub.1 is C.sub.1 -C.sub.6 alkyl; andAr is phenyl optionally substituted with any combination of from one to three halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 haloalkyl, C.sub.1 -C.sub.4 alkoxy or C.sub.1 -C.sub.4 haloalkoxy groups,1- or 2-naphthyl optionally substituted with any combination of from one to three halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 haloalkyl, C.sub.1 -C.sub.4 alkoxy or C.sub.1 -C.sub.4 haloalkoxy groups, ora 5- or 6-membered heteroaromatic ring optionally substituted with any combination of from one to three halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 haloalkyl, C.sub.1 -C.sub.4 alkoxy or C.sub.1 -C.sub.4 haloalkoxy groups,in the absence of phosphonuim halide compoundswhich process comprises reacting a first acid with either:(a) (1) an aldehyde compound of the structural formula II ##STR65##wherein R and Ar are as described above and an alkanol compound of the structural formula IIIR.sub.1 OH (III)wherein R.sub.1 is as described above and a first acid, or(b) an acetal compound of the structural formula IV ##STR66##in the presence of an aprotic solvent at an elevated temperature of from about 50.degree. C. to about 150.degree. C.