Claims
- 1. An azo pyrazolone compound of the formula: ##STR8## wherein Z represents a substituent selected from NO.sub.2, SO.sub.2 R, CO.sub.2 R, NHSO.sub.2 R.sup.1 and NHCOR.sup.1 in which R is a hydrocarbyl group, R.sup.1 is an aryl group and the sulphonic acid group in ring A is in the 3-position relative to the pyrazolyl group, said compound being in the form of a salt.
- 2. A compound according to claim 1 wherein the salt is a metal salt or a salt of a nitrogenous base.
- 3. A compound according to claim 1 wherein Z represents a substituent selected from SO.sub.2 R, CO.sub.2 R, NHSO.sub.2 R.sup.1 and NHCOR.sup.1.
- 4. A compound according to claim 1 wherein Z represents NHCOR.sup.1.
- 5. A compound according to claim 1 wherein R.sup.1 is a phenyl or tolyl group.
- 6. A compound according to claim 1 wherein Z represents NHCOR.sup.1, R.sup.1 is a phenyl group and the salt is an alkaline earth metal salt or a salt with a primary, secondary or tertiary amine or a quaternary ammonium salt.
- 7. A compound according to claim 6 wherein the salt is a calcium salt.
- 8. A compound according to claim 1 having the formula: ##STR9## wherein Z is as defined in claim 1.
- 9. A method for the preparation of an azo pyrazolone compound as defined in claim 1 which comprises diazotising a substituted sulphonated aniline of the formula: ##STR10## wherein Z is as defined in claim 1 and coupling the resulting diazo compound with a sulphonated 3-methyl-1-phenylpyrazol-5-one of the formula: ##STR11## wherein the sulphonic acid group is in the 3-position relative to the pyrazolyl group, and converting the resulting monoazo compound to the desired salt form.
- 10. A plastic material pigmented with a compound according to claim 1.
- 11. A surface coating pigmented with a compound according to claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9501088 |
Jan 1995 |
GBX |
|
Parent Case Info
This application is the national phase of international application PCT/GB95/02832, filed Dec. 5, 1995 which was designated the U.S.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/GB95/02832 |
12/5/1995 |
|
|
7/17/1997 |
7/17/1997 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO96/22333 |
7/25/1996 |
|
|
US Referenced Citations (5)
Foreign Referenced Citations (6)
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EPX |
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EPX |
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Nov 1990 |
EPX |
128 906 |
Nov 1928 |
CHX |
128 909 |
Nov 1928 |
CHX |
128 907 |
Nov 1928 |
CHX |