Claims
- 1. Compounds of the structure ##STR8## wherein n is an integer from 3 to 10 inclusive, R.sup.1 and R.sup.2 are selected from the group consisting of alkyl, unsaturated alkyl, alkoxy, aryl, hydrogen and moieties which actively assist in complexing metal cations, and R.sup.3 is selected from the group consisting of hydrogen and lower alkyl, but at least one of R.sup.1 and R.sup.2 is a moiety which actively assists in complexing metal cations.
- 2. Compounds according to claim 1 wherein R.sup.3 is methyl.
- 3. Compounds according to claim 1 wherein said moiety which actively assists in complexing metal cations is selected from the group consisting of diaminoalkyl, cyanoalkyl and ethyleneoxy groups.
- 4. Compounds according to claim 3 wherein one of R.sup.1 and R.sup.2 is selected from the group consisting of alkyl, unsaturated alkyl, alkoxy, aryl and hydrogen.
- 5. Compounds according to claim 3 wherein said moiety is selected from the group consisting of --CH.sub.2 CH.sub.2 CH.sub.2 CN; --CH.sub.2 CH.sub.2 CH.sub.2 NHCH.sub.2 CH.sub.2 NH.sub.2 and --OCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 CH.sub.2 OCH.sub.3.
- 6. [N-(2-aminoethyl)-3-aminopropyl]methylsila-14-crown-5.
- 7. A method for producing modified silacrown ethers by a transesterification reaction between a polyalkylene glycol having the general formula
- HO(CH.sub.2 CHR.sup.3 O).sub.n H
- wherein n is an integer from 3 to 10 inclusive and R.sup.3 is hydrogen or lower alkyl, and a silane having the general formula
- R.sup.1 R.sup.2 Si(Y).sub.2
- under conditions which promote cyclization over polymerization, wherein Y is selected from the group consisting of alkoxy, acyloxy, amino and chloro, and R.sup.1 and R.sup.2 are selected from the group consisting of alkyl, unsaturated alkyl, alkoxy, aryl, hydrogen and moieties which actively assist in complexing metal cations, but at least one of R.sup.1 and R.sup.2 is a moiety which actively assists in complexing metal cations.
- 8. A method according to claim 7 wherein said glycol is polypropylene glycol.
- 9. A method according to claim 7 wherein the reaction uses a separate catalyst.
- 10. A method according to claim 7 wherein said moiety which actively assists in complexing metal cations is selected from the group consisting of aminoalkyl, cyanoalkyl and ethyleneoxy groups.
- 11. A method according to claim 10 wherein said moiety is an amine group which also catalyzes the esterification reaction.
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation of copending U.S. Application Ser. No. 431,940, filed Sept. 30, 1982, now abandoned, which is a continuation-in-part of copending U.S. Application Ser. No. 323,629, filed Nov. 23, 1981, now U.S. Pat. No. 4,362,884 by Barry C. Arkles for "Silacrown Ethers, Methods of Making Same, and Use as Phase-Transfer Catalysts".
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4362884 |
Arkles |
Dec 1982 |
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Non-Patent Literature Citations (4)
Entry |
C. J. Pederson, J. Am. Chem. Soc., 89,7017 (1967). |
T. G. Waddell, D. E. Leyden, J. Org. Chem., 46,2406-7, (1981). |
R. Kieble, C. Burkhard, J. Am. Chem. Soc., 69, 2689 (1947). |
PCR Research Chemicals, Inc., technical bulletin, Crown Ethers, Von Hoang Thi Phung, Pham Ba Chi, F. Kober, Z. Anorg. Allg. Chem., 472,75-82 (1981), (German Language-no translation). |
Continuations (1)
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Date |
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Parent |
431940 |
Sep 1982 |
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Continuation in Parts (1)
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323629 |
Nov 1981 |
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