Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector – Bacterium or component thereof or substance produced by said...
Patent
1981-04-28
1982-11-30
Jiles, Henry R.
Drug, bio-affecting and body treating compositions
Antigen, epitope, or other immunospecific immunoeffector
Bacterium or component thereof or substance produced by said...
546119, A61K 3144, C07D47104
Patent
active
043615686
ABSTRACT:
1-R-3-(NB)-5-PY-6-Q-1H-pyrazolo[3,4-b]pyridines or pharmaceutically-acceptable acid-addition salts thereof, which are useful as cardiotonics, are prepared by reacting a 1-R-5-PY-6-Q-1H-pyrazolo[3,4-b]pyridin-3-amine with a lower-alkanoic acid and reducing agent to produce 1-R-3-(NB)-5-PY-6-Q-1H-pyrazolo[3,4-b]pyridine (I) where NB is NHR.sub.1 or NR.sub.1 R.sub.2, with a mixture of formic acid and formaldehyde to produce I where NB is N(CH.sub.3).sub.2 or with a lower-acylating agent to produce I where NB is NHAc and, if desired, reacting the 3-(NHAc) compound with a reducing agent to prepare the corresponding 3-NHR.sub.1 compound, where R is lower-alkyl, lower-hydroxyalkyl, lower-acyloxy-(lower-alkyl) or lower-alkoxy-alkyl, Q is hydrogen or lower-alkyl, PY is 4- or 3-pyridinyl or 4- or 3-pyridinyl having one or two lower-alkyl substituents, and NB is selected from NHR.sub.1, NR.sub.1 R.sub.2 or NHAc where R.sub.1 and R.sub.2 are each lower-alkyl and Ac is lower-acyl. Also shown are cardiotonic compositions and method for increasing cardiac contractility using said compounds or salts.
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Gruett Monte D.
Lesher George Y.
Bair Robert K.
DuPont Paul E.
Harkaway Natalia
Jiles Henry R.
Sterling Drug Inc.
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