Claims
- 1. A 2,3-dihalo-5-PY-6-Q-pyridine having the formula ##STR3## or pharmaceutically-acceptable acid-addition salt thereof, where halo is chloro or bromo, PY is 4- or 3-pyridinyl or 4- or 3-pyridinyl having one or two lower-alkyl substituents, and Q is hydrogen or lower-alkyl.
- 2. A compound according to claim 1 where halo is chloro, PY is 4-pyridinyl or 3-pyridinyl, and Q is hydrogen, methyl or ethyl.
- 3. The process which comprises reacting 3-nitro-5-PY-6-Q-2(1H)-pyridinone with a halogenating agent to produce 2,3-dihalo-5-PY-6-Q-pyridine according to claim 1 where halo is bromo or chloro, and PY and Q have the meanings given in claim 1.
- 4. The process according to claim 3 wherein halo is chloro, PY is 4-pyridinyl or 3-pyridinyl, and Q is hydrogen, methyl or ethyl.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a division of copending application Ser. No. 231,312, filed Feb. 4, 1981, now U.S. Pat. No. 4,331,672 in turn, a continuation-in-part of copending application Ser. No. 135,100, filed Mar. 28, 1980, and now U.S. Pat. No. 4,297,360, issued Oct. 27, 1981, which discloses 5-(pyridinyl)pyridine-2-hydrazines claimed herein as intermediates for preparing 5-(pyridinyl)pyridin-2-amines.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4297360 |
Lesher et al. |
Oct 1981 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
1322318 |
Jul 1973 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
231312 |
Feb 1981 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
135100 |
Mar 1980 |
|