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    • 1. 发明授权
    • Quinazolinone derivatives and a process for production thereof
    • 喹唑啉酮衍生物及其生产方法
    • US4099002A
    • 1978-07-04
    • US495829
    • 1974-08-08
    • Shigeho InabaMichihiro YamamotoKikuo IshizumiKazuo MoriMasao KoshibaHisao Yamamoto
    • Shigeho InabaMichihiro YamamotoKikuo IshizumiKazuo MoriMasao KoshibaHisao Yamamoto
    • C07D239/82C07D403/06C07D413/06
    • C07D403/06C07D239/82C07D413/06
    • 3,4-Dihydro-2(1H)-quinazolinone derivatives of the formula, ##STR1## wherein R.sub.1 and R.sub.2 signify individually a hydrogen atom, a lower alkyl group, a lower alkoxy group, a nitro group, a trifluoromethyl group, a lower alkylthio group, a lower alkylsulfonyl group or a halogen atom; R.sub.3 signifies a phenyl group, a halophenyl group, a lower alkylphenyl group, a lower alkoxyphenyl group, a trifluoromethylphenyl group, a lower cycloalkyl group, a lower cycloalkenyl group, a pyridyl group, a pyrrolyl group, a furyl group, a thienyl group or a naphthyl group; R.sub.4 signifies a lower alkyl group, a lower alkenyl group, an aralkyl group, a lower cycloalkylalkyl group, a lower cycloalkyl group, a lower alkoxyalkyl group, a lower alkylthioalkyl group, a lower hydroxyalkyl group, a lower alkanoyloxyalkyl group, a phenyl group, a halophenyl group, a trifluoromethylphenyl group, a lower alkylphenyl group a lower alkoxyphenyl group, a pyridyl group or a group of the formula ##STR2## wherein n signifies an integer of 1 to 4; and R.sub.5 and R.sub.6 signify individually a lower alkyl group, provided that they may form together with the adjacent nitorgen atom an optionally substituted 5- or 6-membered heterocyclic ring, which may further contain a hetero atom); and R signifies a hydrogen atom, a lower alkyl group, a lower alkenyl group, a lower alkoxyalkyl group, a lower alkylthioalkyl group, an aralkyl group, a lower cycloalkylalkyl group, a lower trihalomethylalkyl group or a group of the formula ##STR3## (wherein n, R.sub.5 and R.sub.6 signify the same as defined above), which have excellent pharmacological properties such as central nervous system depressant, anti-inflammatory, analgestic and anti-microbial activities, can be produced by reducing a compound of the formula, ##STR4## wherein R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 have the same meanings as defined above; and X.sub.1, X.sub.2 and X.sub.3 signify individually a halogen atom, or by the substitution reaction of the ring nitrogen atom of a 1 or 3-unsubstituted 3,4-dihydro-2(1H)-quinazolinone derivative.
    • 2. 发明授权
    • Triazoloquinazolines
    • 三唑并喹唑啉
    • US4002755A
    • 1977-01-11
    • US552889
    • 1975-02-25
    • Michihiro YamamotoShigeaki MorookaMasao KoshibaShigeho InabaHisao Yamamoto
    • Michihiro YamamotoShigeaki MorookaMasao KoshibaShigeho InabaHisao Yamamoto
    • C07D239/84C07D249/08C07D487/04C07D491/147
    • C07D487/04C07D239/84
    • Triazoloquinazolines of the formula, ##STR1## wherein R.sub.1 is C.sub.1.sub.-4 alkyl or aryl; R.sub.2 and R.sub.3 are independently hydrogen, halogen, trifluoromethyl, nitro, C.sub.1.sub.-4 alkyl or C.sub.1.sub.-4 alkoxy, or R.sub.2 and R.sub.3 together may form methylenedioxy; and R.sub.4 is hydrogen, C.sub.1.sub.-4 alkyl, aralkyl, C.sub.1.sub.-4 haloalkyl, or C.sub.3.sub.-6 cycloalkyl; and pharmaceutically acceptable acid addition salts thereof are prepared by (a) reacting a 2-hydrazinoquinazoline derivative with a carboxylic acid or reactive derivative thereof, (b) cyclizing a 2-acylhydrazinoquinazoline derivative with heating or (c) reacting a triazolylbenzophenone derivative with ammonia. Said triazoloquinazolines and pharmaceutically acceptable acid addition salts thereof show excellent anti-inflammatory and analgesic activities.
    • 式中的三唑并喹唑啉,其中R 1为C 1-4烷基或芳基; R2和R3独立地是氢,卤素,三氟甲基,硝基,C1-4烷基或C1-4烷氧基,或者R2和R3一起可以形成亚甲二氧基; 和R 4是氢,C 1-4烷基,芳烷基,C 1-4卤代烷基或C 3-6环烷基; (a)使2-肼基喹唑啉衍生物与羧酸或其反应性衍生物反应,(b)使2-酰基肼基喹唑啉衍生物加热环化,或(c)使三唑基二苯甲酮衍生物与氨反应,制备其药学上可接受的酸加成盐。 所述三唑并喹唑啉及其药学上可接受的酸加成盐显示出优异的抗炎和止痛活性。
    • 7. 发明授权
    • Nitroquinazolinone compounds having antiviral properties
    • 具有抗病性的硝基喹唑啉酮化合物
    • US4146717A
    • 1979-03-27
    • US454284
    • 1974-03-25
    • Michihiro YamamotoShigeaki MorookaMasao KoshibaToshiaki KomatsuHiroshi NoguchiShigeho InabaHisao Yamamoto
    • Michihiro YamamotoShigeaki MorookaMasao KoshibaToshiaki KomatsuHiroshi NoguchiShigeho InabaHisao Yamamoto
    • C07D239/82
    • C07D239/82
    • Viral infections caused by viruses which belong to, e.g. Pox, Herpes, Adeno, Myxo, Paramyxo groups are controlled by administering an effective amount of quinazoline derivatives of the formula ##STR1## wherein R.sub.1 is cyclo, C.sub.3 -C.sub.8 alkyl, cyclo C.sub.3 -C.sub.8 alkyl C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy C.sub.1 -C.sub.4 alkyl, C.sub.2-C.sub.5 alkenyloxy C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkylthio C.sub.1 -C.sub.4 alkyl, polyhalo C.sub.1- C.sub.4 alkyl, a group of the formula ##STR2## (wherein m is an integer of 1 to 3; and R.sub.4 and R.sub.5 are individually C.sub.1 -C.sub.4 alkyl, and may form together with the adjacent nitrogen atom an unsubstituted or C.sub.1 -C.sub.4 alkyl substituted 3 to 6 membered saturated heterocyclic ring, which may contain another nitrogen or oxygen atom) or a group of the formula --C.sub.n H.sub.2n --R.sub.6 (wherein n is 0 or an integer of 1 to 3; and R.sub.6 is a phenyl group, a substituted phenyl group or an aromatic or non-aromatic 3 to 6 membered heterocyclic ring which contains one or two hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atom, and may be optionally substituted by one or two C.sub.1 -C.sub.4 alkyl, and further, those substituents on adjacent carbon atoms may be joined to form a benzene or cyclohexane ring); R.sub.2 is hydrogen, halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 alkylsulfonyl, trifluoromethyl or nitro; and R.sub.3 is phenyl, substituted phenyl, cyclo C.sub.3 -C.sub.6 alkyl, pyridyl, furyl, nitrofuryl, thienyl, nitrothienyl, methylthienyl or pyrimidinyl.