Methods of using silacrown ethers as catalysts
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United States of America Patent
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Oct 13, 1987
Issued Date -
N/A
app pub date -
Sep 29, 1982
filing date -
Nov 23, 1981
priority date (Note) -
Expired
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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.
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