Claims
- 1. A compound 1-[[(pyrazolesulfonyl)amino]carbonyl]pyridinium hydroxide having the following formula (VIII), ##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.
- 2. The compound of formula (VIII) according to claim 1, characterized in that R.sup.1 represents methyl, R.sup.2 represents ethyl and R.sup.3 represents hydrogen.
- 3. A process for preparing sulfonylchloride derivatives having the following formula (V), ##STR16## 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 pyrazole disulfide derivative of formula (XI), ##STR17## wherein R.sup.1, R.sup.2 and R.sup.3 are as defined above, with an aqueous hydrochloric acid solution and hydrogen peroxide solution in the presence of an organic solvent.
- 4. The process according to claim 3, wherein said solvent is n-hexane; dichloromethane or toluene.
- 5. The process according to claim 3, wherein aqueous hydrochloric acid solution and hydrogen peroxide solution are used in an amount of 6.0 to 8.0 equivalent weights, respectively, with respect to the disulfide compound of formula (XI).
- 6. The process according to any one of claims 3 to 5, wherein the reaction temperature is 35.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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