Methods of using silacrown ethers as catalysts

Details Methods of using silacrown ethers as catalysts Methods of using silacrown ethers as catalysts

1982-09-29

1987-10-13

Chan, Nicky

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

Organic compounds

Nitriles

558337, 560236, 570163, C07C12002, C07C12004, C07C12506

Patent

active

046999914

ABSTRACT:
Organosilicon compounds referred to as silacrown ethers or "silacrowns" are of the general formula: ##STR1## where R.sup.1 and R.sup.2 are organic radicals or hydrogen and n is an integer between 4 and 10 inclusive. Silacrown ethers are prepared by reacting polyethylene glycol with substituted silanes under conditions promoting cyclization over polymerization. Silacrown ethers may be employed as phase-transfer catalysts in solution or immobilized on siliceous supports.

REFERENCES:
patent: 4056509 (1977-11-01), Werbrugge et al.
Walter E. Keller, "Compendium of Phase-Transfer Reactions and Related Synthetic Methods, Listed According to Type of Compound Formed", 1979, Fluka AG, Switzerland, pp. I-XXV.
C. J. Pederson, J. Am. Chem. Soc., 89, 7017 (1967).
R. Kieble, C. Burkhard, J. Am. Chem. Soc. 69, 2689 (1947).

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