Claims
- 1. Phosphobetaines of the formula I ##STR12## in which R.sup.1 is methyl and R.sup.2 has the meaning of R.sup.1 or of R, R being a radical of the formula II ##STR13## in which R.sup.3 is hydrogen and R.sup.4 is methyl or hydrogen, and R.sup.5 is alkyl of 1-4 carbons.
- 2. Phosphobetaine of the formula ##STR14##
- 3. Phosphobetaine of the formula ##STR15##
- 4. A process for making phosphobetaines of the formula ##STR16## in which R.sup.1 is methyl and R.sup.2 has the meaning of R.sup.1 or of R, R being a radical of the formula II ##STR17## in which R.sup.3 is hydrogen and R.sup.4 is methyl or hydrogen, and R.sup.5 is alkyl of 1-4 carbons, which process comprises reacting phosphines of the formula III ##STR18## in which R.sup.1 and R.sup.4 have the meanings given above, with an .alpha.,.beta.-unsaturated carboxylic acid of the formula IV ##STR19## in which R.sup.3, R.sup.4 and R.sup.5 have the meanings given above, the reaction being effected in a single stage in the presence of water or a solvent/water-mixture, and separating the resulting phosphobetaines from the reaction product obtained.
- 5. The process as claimed in claim 4, wherein the reaction is effected in the presence of a catalyst.
- 6. The process as claimed in claim 5, wherein metal chlorides, sulfates or acetates are used as the catalyst.
- 7. The process as claimed in claim 6, wherein the catalyst is a chloride, sulfate or acetate of cadmium, nickel or cobalt.
- 8. The process as claimed in claim 5, wherein the catalyst is used at a rate of 0.1 to 10 millimol, based on the total mixture.
- 9. The process as claimed in claim 8, wherein the catalyst is used at a rate of 1 to 5 millimol, based on the total mixture.
- 10. The process as claimed in claim 4, wherein the reaction is effected at temperatures of 0.degree. to 120.degree. C.
- 11. The process as claimed in claim 10, wherein the reaction is effected at temperatures of 15.degree. to 80.degree. C.
- 12. The process as claimed in claim 4, wherein the solvent is an alcohol, acetonitrile or a mixture thereof.
- 13. The process as claimed in claim 4, wherein the phosphobetaine is separated from the reaction mixture by distillative removal of the solvent.
- 14. The process as claimed in claim 4, wherein the formula III phosphine and the formula IV .alpha.,.beta.-unsaturated carboxylic acid ester are reacted in the stoichiometric proportions necessary for the formation of the formula I phosphobetaine.
- 15. The process as claimed in claim 4, wherein the formula IV .alpha.,.beta.-unsaturated carboxylic acid ester is introduced together with the catalyst into an aqueous phase being water or a water/solvent-mixture, the formula III phosphine is added thereto, the whole is reacted at 0.degree. to 120.degree. C, the resulting reaction solution is allowed to stand for a period of 2 to 3 hours, and the phosphobetaine is separated from the solvent.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2540260 |
Sep 1975 |
DEX |
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Parent Case Info
This application is a continuation-in-part application of application Ser. No. 721,087 filed Sept. 7, 1976 now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3654342 |
Gillham et al. |
Apr 1972 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
721087 |
Sep 1976 |
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