Process for the preparation of organosilanes containing methacryloyloxy or acryloyloxy groups

Claim 1

The method of preparing an organosilane of the formula ##STR7## wherein R 1 is hydrogen or methyl, R 2 is alkyl of 1 to 4 carbon atoms, R 3 is alkyl of 1 to 4 carbon atoms or alkoxyalkyl of a total number of 2 to 4 carbon atoms, m is 0, 1 or 2, and n is 1, 3 or 4, which comprises reacting an alkali metal methacrylate or alkali metal acrylate with an haloalkylsilane of the formula ##STR8## wherein R 2 , R 3 , m and n have the meanings previously defined, and Hal is chlorine or bromine, at a temperature of 80° to 150° C. in the presence of a pyridinium salt of the formula ##STR9## wherein Y is halogen R 4 , R 5 and R 6 , which may be identical to or different each other are independently aliphatic radicals of 1 to 12 carbon atoms, cycloaliphatic radicals of 5 to 7 carbon atoms or benzyl, or R 4 and R 5 together with each other may be (--CH 2 --) p , where p is 4, 5 or 6 and the ring formed by R 4 , R 5 and the nitrogen atom to which they are attached may be interrupted by an oxygen atom between vicinal carbon atoms, or R 6 may be an organosilane radical of the formula ##STR10## wherein R 2 , R 3 , m and n have the meanings previously defined, as a phase transfer catalyst.

Claim 2

The method of preparing an organosilane of the formula ##STR7## wherein R 1 is hydrogen or methyl, R 2 is alkyl of 1 to 4 carbon atoms, R 3 is alkyl of 1 to 4 carbon atoms or alkoxyalkyl of a total number of 2 to 4 carbon atoms, m is 0, 1 or 2, and n is 1, 3 or 4, which comprises reacting an alkali metal methacrylate or alkali metal acrylate with an haloalkylsilane of the formula ##STR8## wherein R 2 , R 3 , m and n have the meanings previously defined, and Hal is chlorine or bromine, at a temperature of 80° to 150° C. in the presence of a pyridinium salt of the formula ##STR9## wherein Y is halogen R 4 , R 5 and R 6 , which may be identical to or different each other are independently aliphatic radicals of 1 to 12 carbon atoms, cycloaliphatic radicals of 5 to 7 carbon atoms or benzyl, or R 4 and R 5 together with each other may be (--CH 2 --) p , where p is 4, 5 or 6 and the ring formed by R 4 , R 5 and the nitrogen atom to which they are attached may be interrupted by an oxygen atom between vicinal carbon atoms, or R 6 may be an organosilane radical of the formula ##STR10## wherein R 2 , R 3 , m and n have the meanings previously defined, as a phase transfer catalyst.