Patent PT-81366-B (PT)
Title: Process for preparing 1,4-dihydropyridine-hydroxyamines useful as medicaments
Inventor: TRIGGLE DAVID
IPC: C07D271/00
Filed: 1985-10-24
Abstract: 1. Compounds of the general formula (I)  see diagramm : EP0179386,P26,F3  in which R represents phenyl, pyridyl or the benzoxadiazolyl radical, the phenyl radical containing 1 or 2 identical or different substituents from the group comprising nitro, trifluoromethyl, fluorine, chlorine and cyano, R**1 and R**3 are identical of different and each represent alkyl with 1 to 4 carbon atoms, or one of the substituents R**1 or R**3 represents hydroxymethyl, amino or cyano, R**2 represents hydrogen or alkyl with 1 or 2 carbon atoms, A either represents an alkylene group which has up to 12 carbon atoms and is substituted by methyl, ethyl or propyl, and which is optionally substituted or interrupted by a phenyl group and/or is optionally interrupted by an oxygen or sulphur atom or a grouping of the formula -NR**6 , or A represents a straight-chain or branched alkylene group which has up to 12 carbon atoms and is optionally interrupted by an oxygen or sulphur atom or a grouping of the formula -NR**6 when a) R**4 represents phenyl, benzyl, CO-R**6 , CO2 -R**6' , CO-NR**6 R**7 , SO2 R6 or -CH2 -CHOH-CH2 -OR**8 , or b) R represents pyridyl or benzoxadiazolyl, or c) R**5 represents indolyl, or d) the alkylene chain is interrupted by a sulphur atom or the group -NR**6 or e) X represents COR**9 , wherein R**6 und R**7 are identical or different and each represent hydrogen, alkyl with up to 4 C atoms, benzyl or phenyl and wherein R**8 has the meaning given for R**5 and can be identical or different from this radical wherein R**9 represents alkyl which has 1 to 7 C atoms and is optionally substituted by halogen, cyano, alkoxy or dialkylamino with in each case 1-4 C atoms, or denotes phenyl, naphthyl, phenylalkyl or anilino or an amino, monoalkylamino or dialkylamino group with in each case 1 to 4 C atoms, the alkyl groups optionally forming, with the nitrogen atom a 5-membered to 7-membered ring which can contain an oxygen atom as a further hetero-atom and wherein R**6' has the meaning of R**6 , but does not denote hydrogen, R**4 represents hydrogen, or represents straight-chain or branched alkyl with 1 to 3 carbon atoms, or represents phenyl or benzyl, or represents a radical of the formula CO-R**6 , CO2 -R**6' , CO-NR**6 R**7 , SO2 -R**6 or -CH2 -CHOH-CH2 -OR**8 , wherein R**6 , R**6' , R**7 , R**8 und R**9 have the abovementioned meaning, R**5 represents phenyl, naphthyl or indolyl, the phenyl radical optionally being substituted by 1 or 2 identical or different substituents from the group comprising fluorine, chlorine, nitro, cyano, alkyl with 1 or 2 C atoms, NR**6 , R**7 , NR**6 COR**7 , the group CH2 -CO-NH2 or acetyl and X represents the group COOR**10 , wherein R**10 represents a straight-chain, branched or cyclic alkyl radical which has up to 12 C atoms and is optionally interrupted in the chain by an oxygen atom and/or is optionally substituted by fluorine, chlorine, hydroxyl, pyridyl, phenyl or amino, or represents the group COR**9 , wherein R**9 has the abovementioned meaning, and pharmaceutically acceptable acid addition salts thereof.