Modified silacrown ethers and methods of making same
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United States of America Patent
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Jun 24, 1986
Issued Date -
N/A
app pub date -
Feb 15, 1984
filing date -
Sep 30, 1982
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Expired
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Abstract
Modified silacrown ethers are formed having the general formula: ##STR1## wherein R.sup.1 and R.sup.2 are organic radicals, hydrogen or groups which actively assist in the complexing of metal cations, n is an integer between 3 and 10 inclusive, and R.sup.3 is hydrogen or lower alkyl. These modified silacrown ethers are prepared by reacting a polyalkylene glycol with substituted silanes under conditions promoting cyclization over polymerization. The modified silacrown ethers are useful for forming cation complexes and promoting anionic reactions, particularly in phase transfer reactions either in solution or immobilized on siliceous supports.
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