Patent number: 4933448
Abstract: Chromogenic lactone compounds of benzopyrano-2H-pyrazoles of the formula ##STR1## in which Ar is an aryl radical which is unsubstituted or substituted by halogen, nitro, cyano, lower alkyl, lower alkoxy, lower alkylthio, lower alkoxycarbonyl, trifluoromethyl, phenoxy, phenylthio or --NX.sub.3 X.sub.4,R.sub.1 is hydrogen, lower alkyl or lower alkoxy,R.sub.2 is lower alkyl, phenyl, or phenyl which is substituted by halogen, lower alkyl or lower alkoxy, andX.sub.1, X.sub.2, X.sub.3 and X.sub.4, independently of one another, are each hydrogen, alkyl which is unsubstituted or substituted by halogen, hydroxyl, cyano, tetrahydrofuryl or lower alkoxy, or are acyl, cycloalkyl, or aralkyl or aryl, each of which is unsubstituted or substituted by halogen, cyano, nitro, trifluoromethyl, lower alkyl, lower alkoxy or lower alkoxycarbonyl, or the substituent pairs (X.sub.1 and X.sub.2) and (X.sub.3 and X.sub.
Type:
Grant
Filed:
April 25, 1989
Date of Patent:
June 12, 1990
Assignee:
Ciba-Geigy Corporation
Inventor:
Ian J. Fletcher
Patent number: 4931454
Abstract: An azachroman derivative of the formula ##STR1## wherein Z is(a) --N.dbd.CH--CH.dbd.CH--,(b) --CH.dbd.N--CH.dbd.CH--,(c) --CH.dbd.CH--N.dbd.CH-- or(d) --CH.dbd.CH--CH.dbd.N--;R.sup.1 is A,R.sup.2 is H or A, orR.sup.1 and R.sup.2 together are alkylene with 3-6 C atoms;R.sup.3 is OH or OAc,R.sup.4 is H, orR.sup.3 and R.sup.4 together are a bond;R.sup.5 is 1H-2-pyridon-1-yl, 1H-6-pyridazinon-1-yl, 1H-2-pyrimidinon-1-yl, 1H-6-pyrimidinon-1-yl, 1H-2-pyrazinon-1-yl or 1H-2-thiopyridon-1-yl, or 1H-2-pyridon-1-yl, 1H-6-pyridazinon-1-yl, 1H-2-pyrimidinon-1-yl, 1H-6-pyrimidinon-1-yl, 1H-2-pyrazinon-1-yl or 1H-2-thiopyridon-1-yl mono- or disubstituted by A, F, Cl, Br, I, OH, OA, OAc, NO.sub.2, NH.sub.2, AcNH, HOOC or AOOC;A is C.sub.1-6 -alkyl andAc is C.sub.1-18 -alkanoyl or C.sub.7-11 -aroyl;or a pharmaceutically acceptable salt thereof is claimed. This compound exhibits vasodilatory and anti-hypertensive effects and is suitable for the treatment of alopecia.
Type:
Grant
Filed:
September 23, 1988
Date of Patent:
June 5, 1990
Assignee:
Merck Patent Gesellschaft mit beschrankter Haftung
Inventors:
Manfred Baumgarth, Rolf Gericke, Ingeborg Lues, Jacques De Peyer, Rolf Bergmann