Claims
- 1. A process for preparing a substituted aminoalkenamide of the formula (IIa) comprising reacting a substituted pyrimidone of the formula (III) whereinA represents a single bond or represents alkanediyl, Ar represents optionally substituted aryl, R1 represents optionally substituted alkyl and R2 represents hydrogen, halogen or alkyl, at temperatures between 0° C. and 100° C. with an acid, if appropriate in the presence of a diluent.
- 2. A process for preparing a substituted aminoalkenamide of the formula (IIb) comprising reacting a substituted oxazinone of the formula (IV) whereinR1 represents optionally substituted alkyl and R2 represents hydrogen, halogen or alkyl, with an ar(alk)ylamines of the formula (V) H2N—A—Ar (V) whereinA represents a single bond or represents alkanediyl, and Ar represents optionally substituted aryl, at temperatures between 0° C. and 150° C., if appropriate in the presence of a diluent.
- 3. A substituted pyrimidone of the (III) whereinA represents a single bond or represents alkanediyl, Ar represents optionally substituted aryl, R1 represents optionally substituted alkyl and R2 represents hydrogen, halogen or alkyl.
- 4. A process for preparing a substituted pyrimidone of the formula (III) comprising reacting a substituted aminoalkenamide of the formula (VI) whereinA represents a single bond or represents alkanediyl, Ar represents optionally substituted aryl, R1 represents optionally substituted alkyl and R2 represents hydrogen, halogen or alkyl with dichloromethylene-dimethylimmonium chloride of the formula (VII) Cl2C═N(CH3)2 Cl (VII) at temperatures between 0° C. and 100° C. in the presence diluent.
- 5. A process for preparing a ar(alk)yluracil of the formula (I) whereinA represents a single bond or represents alkanediyl, Ar represents optionally substituted aryl, R1 represents optionally substituted alkyl and R2 represents hydrogen, halogen or alkyl, comprising the steps of: a) reacting a substituted aminoalkenamide of the general formula (VI) wherein A, Ar, R1 and R2 are as defined above with dichloromethylene-dimethylimmonium chloride of the formula (VII)Cl2C═N(CH3)2Cl (VII) at temperatures between 0° C. and 100 °C. in the presence of a diluent;b) reacting the substituted pyrimidone of the formula (III) prepared in step a) wherein A, Ar, R1 and R2 are as defined above at temperatures between 0° C. and 100° C. with an acid, if appropriate in the presence of a diluent, andc) heating of the substituted aminoalkenamide of the general formula (IIa) prepared in step b) wherein A, Ar, R1 and R2 are as defined above at temperatures between 40° C. and 120° C., if appropriate in the presence of a diluent.
Priority Claims (1)
Number |
Date |
Country |
Kind |
197 50 195 |
Nov 1997 |
DE |
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Parent Case Info
This is a divisional application of Ser. No. 09/530,992, filed May 8, 2000 which now U.S. Pat. No: 6,225,470.
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Jan 1997 |
A |
5681794 |
Andree et al. |
Oct 1997 |
A |
Non-Patent Literature Citations (2)
Entry |
Bull. Soc. Chim. Belg. vol. 101, (month unavailable) 1992, pp. 313-321. |
Marie-Aimée Decock-Plancquaert et al, Syntheses of New 4-Trifluoromethylated 1,3-Oxazin-6-Ones From the Enamine of Ethyl Trifluoroacetoacetate. |