79739-22-3Relevant articles and documents
A CONVENIENT SYNTHESIS OF 3,4'-BIPYRIDINE
Shiao, Min-Jen,Shieh, Puh,Lai, Jen-Shiow
, p. 1397 - 1402 (2007/10/02)
3,4'-Bipyridine was synthesized from 6-methoxy-3,4'-bipyridine or 6-benzyloxy-3,4'-bipyridine via 6-chloro-3,4'-bipyridine.The chloro derivative was catalytically dechlorinated into the corresponding 3,4'-bipyridine.
5-(Pyridinyl)pyridine-2-hydrazines, their preparation and their cardiotonic use
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, (2008/06/13)
2-[R1 NHN(R)]-3-Q'-5-Py-6-Q-pyridines or pharmaceutically-acceptable acid-addition salts thereof are useful as cardiotonic agents, where Q is hydrogen or lower-alkyl, PY is 4- or 3-pyridinyl or 4- or 3-pyridinyl having one or two lower-alkyl substituents, Q' is hydrogen or halo, R is hydrogen, lower-alkyl or lower-hydroxyalkyl, and R1 is hydrogen or when R is other than hydrogen R1 is the same as R. These compounds are prepared by reacting a 2-halo-3-Q'-5-PY-6-Q-pyridine with R1 NHNHR where 2-halo is bromo or chloro. Also shown are: the use of said 2-[R1 NN(R)]-3-Q'-5-PY-6-Q-pyridines as cardiotonic agents; and, the intermediates, 2,3-dihalo-5-PY-6-Q-pyridines, and their preparation from 3-nitro-5-PY-6-Q-2(1H)-pyridinones.
1,3-Dihydro-6-(pyridinyl)-2H-imidazo[4,5-b]pyridin-2-ones and -imidazo[4,5-b]pyridine-2-thiones and their cardiotonic use
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, (2008/06/13)
1,3-Dihydro-1-R1 -3-R3 -6-PY-5-Q-2H-imidazo[4,5-b]pyridin-2-ones or -2-thiones or pharmaceutically-acceptable acid-addition salts thereof, which are useful as cardiotonic agents, where Q is hydrogen or lower-alkyl, R1 and R3 are each hydrogen, lower-alkyl, lower-hydroxyalkyl, 2,3-dihydroxypropyl, lower-alkoxyalkyl or Y-NB where Y is lower-alkylene and NB is di-(lower-alkyl)amino or 4-morpholinyl, at least one of R1 and R3 being hydrogen, and PY is 4- or 3-pyridinyl or 4- or 3-pyridinyl having one or two substituents, are prepared by reacting a 2-R3 NH-3-R1 NH-5-PY-6-Q-pyridine with urea or carbonyldiimidazole to produce said -2-one or with an alkali metal xanthate, thiourea or thiocarbonyldiimidazole to produce said -2-thione. Also shown and claimed are cardiotonic compositions and a method for increasing cardiac contractility using said cardiotonic agents. Also shown are processes for preparing said intermediate 2-R3 NH-3-R1 NH-5-PY-6-Q-pyridines and other intermediates used in said processes.