Claims
- 1. The process for preparing a 2-[(meth)acrylamidomethyl]-1,3-diketone, which comprises condensing a 1,3-diketone of the formula (II) ##STR7## where R.sup.2 and R.sup.3 are identical to or different from each other and each is alkyl of from 1 to 6 carbon atoms or unsubstituted aryl of from 6 to 20 carbon atoms or a phenyl radical substituted by one halogen radical or one phenyl radical or one or two alkyl radicals, with an N-methylol(meth)acrylamide of the formula (III) ##STR8## where R is hydrogen or methyl and R.sup.1 is hydrogen, methyl or ethyl, in a strong acid as the reaction medium to obtain a 2-[(meth)acrylamidomethyl]-1,3-diketone of the formula (I) ##STR9## where R, R.sup.1, R.sup.2 and R.sup.3 are each independently of the others defined as follows:
- R is hydrogen or methyl,
- R.sup.1 is hydrogen, methyl or ethyl
- R.sup.2 and R.sup.3 each is alkyl of from 1 to 6 carbon atoms or unsubstituted aryl of from 6 to 20 carbon atoms or a phenyl radical substituted by one halogen radical or one phenyl radical or one or two alkyl radicals, R.sup.2 and R.sup.3 being identical to or different from each other.
- 2. A process as claimed in claim 1, wherein R and R.sup.1 in the formula (III) are each hydrogen and R.sup.2 and R.sup.3 in the formula (II) are each methyl or phenyl.
- 3. A process as claimed in claim 1, wherein the strong acid used as the reaction medium is sulfuric acid, trifluoromethanesulfonic acid or phosphoric acid.
- 4. A process as claimed in claim 3, wherein the reaction medium used is concentrated sulfuric acid.
- 5. A process as claimed in claim 1, wherein the condensation reaction is carried out in the presence of a thermal polymerization inhibitor.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3819455 |
Jun 1988 |
DEX |
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Parent Case Info
This is a division of application Ser. No. 360,989, filed June 2, 1989.
Foreign Referenced Citations (1)
Number |
Date |
Country |
0188037 |
Jul 1986 |
EPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
360989 |
Jun 1989 |
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