| 摘要 |
<p>O-silylated ketene acetals and enol ethers are prepared via the 1,4-hydrosilation of a hydrosilation composition selected from the group consisting of aminosilanes, siloxanes and alkylalkoxysilanes with alpha , beta -unsaturated carbonyl in the presence of a rhodium catalyst.
<??>These compounds consist essentially of:
(a) O-aminosilylated ketene acetals and enol ethers of the general formula:
<CHEM>
(b) O-siloxanesilylated ketene acetals and enol ethers of the general formulae:
<CHEM>
(c) O-alkoxysilylated ketene acetals and enol ethers of the general formula:
<CHEM>
wherein R, R<1> and R<2> are individually alkyl or aryl group and R can be hydrogen; R<3>, R<4>, R<5>, R<6>, R<7>, and R<1><0> are individually alkyl groups, R<8> is hydrogen or an alkyl or aryl, Z is selected from hydrogen, an alkyl group, an aryl group, an alkoxy group and an aryloxy group
and a is 0 or 1, b 0 or 1, y has a value from 1 to 500, z has a value from 0 to 499, and, the sum of y+z equals from 1 to 500 with the proviso that if z is 0, a + b must equal at least 1; x is 1, 2 or 3; and v is 0, 1 or 2. </p> |
