Claims
- 1. A chromogenic azaphthalide of the formula ##STR28## wherein R1 and R2 together with the nitrogen to which they are attached are pyrrolidinyl;
- X is hydrogen, halogen, lower alkyl, lower alkoxy, benzyl, phenyl, benzyloxy, phenoxy, or benzyl or benzyloxy which are substituted by halogen, nitro, lower alkyl or lower alkoxy;
- Y' is C6-C9-alkyl;
- Z is hydrogen, lower alkyl or phenyl; and
- the ring A is a pyridine radical and
- the benzene nucleus B is unsubstituted or substituted by halogen, cyano, nitro, lower alkyl, lower alkoxy, lower alkoxycarbonyl, amino, lower alkylamino or di-(lower alkyl)-amino.
- 2. An azaphthalide according to claim 1 wherein X is hydrogen, benzyloxy or lower alkoxy.
- 3. An azaphthalide according to claim 1 of the formula ##STR29## wherein R3 and R4 together with the nitrogen atom to which they are attached are pyrrolidinyl;
- one of Q1 is nitrogen and the other is CH;
- X1 is hydrogen, lower alkoxy or benzyloxy;
- Y' is C6-C9-alkyl;
- Z1 is lower alkyl or phenyl; and
- W is hydrogen or halogen.
- 4. An azaphthalide according to claim 3 wherein Z1 is methyl or phenyl, Y' is C6-C8-alkyl and W is hydrogen.
- 5. An azaphthalide according to claim 4 wherein X1 is lower alkoxy, Z1 is methyl or phenyl and Y' is C6-C8-alkyl.
- 6. An azaphthalide according to claim 5 wherein X1 is ethoxy, Z1 is methyl and Y' is n-octyl.
Priority Claims (3)
Number |
Date |
Country |
Kind |
8250/81 |
Dec 1981 |
CHX |
|
8251/81 |
Dec 1981 |
CHX |
|
1868/83 |
Apr 1983 |
CHX |
|
Parent Case Info
This is a divisional of application Ser. No. 690,075 filed on Jan. 9, 1985, now U.S. Pat. No. 4,587,539, which in turn is a divisional of application Ser. No. 502,035, filed June 7, 1983, now U.S. Pat. No. 4,508,897, issued Apr. 2, 1985, which is a continuation-in-part of application Ser. No. 449,955, filed Dec. 15, 1982.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4046776 |
Garner et al. |
Sep 1977 |
|
4564679 |
Fujino et al. |
Jan 1986 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
49-118515 |
Nov 1974 |
JPX |
2075042 |
Nov 1981 |
GBX |
Divisions (2)
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Number |
Date |
Country |
Parent |
690075 |
Jan 1985 |
|
Parent |
502035 |
Jun 1983 |
|
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
449955 |
Dec 1982 |
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