Process for the preparation of alkyl and aryl substituted oligos

Details Process for the preparation of alkyl and aryl substituted oligos Process for the preparation of alkyl and aryl substituted oligos

1981-02-12

1982-01-05

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

C07F 708, C07F 718

Patent

active

043095577

ABSTRACT:
An improved process for preparing 1,3-dialkyl-1,1,3,3-tetraryldisiloxanes and 1,3,5-trialkyl-1,1,3,5,5-pentaaryltrisiloxanes is disclosed. The process utilizes an aryl Grignard reagent to affect displacement of alkoxy, preferably methoxy, groups in the corresponding alkyl-alkoxy substituted di-, and trisiloxanes. Alternatively, partial replacement of the alkoxy groups in an alkyltrialkoxysilane with aryl groups in a Grignard reaction, and subsequent hydrolyis of the remaining alkoxy groups yield the above-noted desired compounds.

REFERENCES:
patent: 2890234 (1959-06-01), Fletcher et al.
patent: 3334318 (1967-02-01), Brady
patent: 3354101 (1967-11-01), Williams et al.
patent: 3523131 (1970-08-01), Sliwinski
patent: 3792071 (1974-02-01), Nitzsche et al.
Eabor, "Organosilicon Compounds", Butterworth Scientific Pub., London (1960), pp. 300-329.
Sprung et al., J. Am. Chem. Soc., 77, p. 4173 (1955).
Noll, "Chemistry and Technology of Silicones", Academic Press, N.Y. (1968), pp. 41-49.

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