反应详情

6 mg of platinum in the form of a solution of the complex with 1,3-divinyltetramethyldisiloxane are added to 290 ml (2.6 mol) of dimethylchlorosilane and the mixture is heated at reflux under a nitrogen atmosphere. 356 g of the 2-allyloxyethyl phenyl ether whose preparation is described above under a) are added dropwise over the course of about 2 hours, the temperature of the mixture being adjusted to 80° C. After 2 hours the reflux comes virtually to an end. The crude product is fractionated in vacuo, the main fraction being taken off at 95°-110° C. (2 hPa). 437 g of 3-(2-phenoxyethoxy)propyldimethylchlorosilane are obtained with an acid number of 207 (theoretically 205). The 1H NMR spectrum shows that the product contains neither starting material nor its 1-propeneoxy isomer.

1. temperaturethe mixture is heated
2. temperatureat reflux under a nitrogen atmosphere
3. additionare added dropwise over the course of about 2 hours
4. custombeing adjusted to 80° C
5. custombeing taken off at 95°-110° C.