Claims
- 1. A process for preparing sulfonylurea derivatives having the following general formula (I), ##STR15## wherein R.sup.1 represents hydrogen, C.sub.1 -C.sub.4 alkyl or phenyl;
- R.sup.2 represents hydrogen, C.sub.1 -C.sub.4 alkyl, allyl or propargyl; and
- R.sup.3 represents hydrogen, methyl, ethyl or phenyl, comprising reacting
- a compound of formula (VIII), ##STR16## wherein R.sup.1 and R.sup.2 are as defined above, with 2-amino-4,6-dimethoxypyrimidine of formula (VII), ##STR17##
- 2. The process according to claim 1, wherein the reaction is carried out in the presence of a solvent.
- 3. The process according to claim 2, wherein the solvent is a single solvent selected from the group consisting of dichloromethane, trichloroethane, 1,2-dichloroethane, benzene, toluene, chlorobenzene, dichlorobenzene, dimethylformamide, dimethylsulfoxide, ethyl ether, tetrahydrofuran, dioxane, acetonitrile, acetone and diisopropyl ketone, or a mixture of two or more solvents selected therefrom.
- 4. The process according to claim 3, wherein the solvent is acetonitrile or dichloromethane.
- 5. The process according to claim 1, wherein the reaction temperature is 25.degree. to 45.degree. C.
Priority Claims (3)
Number |
Date |
Country |
Kind |
93-3308 |
Mar 1993 |
KRX |
|
93-6409 |
Apr 1993 |
KRX |
|
93-20759 |
Oct 1993 |
KRX |
|
Parent Case Info
This is a divisional of application Ser. No. 08/205,400, filed Mar. 3, 1994 now U.S. Pat. No. 5,480,993.
US Referenced Citations (5)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1445980 |
Feb 1969 |
DEX |
1069040 |
May 1967 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
205400 |
Mar 1994 |
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