1,1,3,5,5-Pentaphenyl-1,3,5-trimethyltrisiloxane synthesis
- Product Name:1,1,3,5,5-Pentaphenyl-1,3,5-trimethyltrisiloxane
- CAS Number:3390-61-2
- Molecular formula:C33H34O2Si3
- Molecular Weight:546.88
Yield: 90.2%
Reaction Conditions:
in toluene
Steps:
10.2 Example 10
(2) Next, a 1-liter 4-necked flask equipped in the same fashion as above was supplied with a sufficient flow therethrough of nitrogen, and then charged with the aforementioned methylsilazane mixture (containing methylphenylsilazane units in an amount of to 0.65 mol), 1.39 g of dodecylbenzenesulfonic acid and 100 ml of toluene. The resultant mixture was heated to a temperature of from 140° to 145° C., and continuously heated under reflux. subsequently, 278.7 g (1.3 mol) of methyldiphenylsilanol was added dropwise thereto over 4 hours, followed by maturing under reflux for 3 hours to complete the reaction. After the reaction mixture was then washed with water and concentrated, the residue was subjected to distillation, to give 320.4 g. of the desired product 1,3,5-trimethyl-1,1,3,5,5-pentaphenyltrisiloxane (yield 90.2%).
References:
Shin-Etsu Chemical Co., Ltd. US5097055, 1992, A
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