申请人:Sandoz, Inc.
公开号:US03997564A1
公开(公告)日:1976-12-14
Disclosed are compounds of the class of 1-alkyl-4-phenyl and 4-(2-thienyl)-6,7-methylenedioxy-2(1H)-quinazolinones and quinazolinthiones, including the 3,4-dihydro derivatives thereof, useful as pharmaceutical agents, e.g. as anti-inflammatory agents. Such compounds, e.g. 1-isopropyl-4-phenyl-6,7-methylenedioxy-2(1H)-quinazolinones and 1-isopropyl-4-phenyl-6,7-methylenedioxy-2(1H)-quinazolinthiones, may be prepared by reacting the corresponding N-alkyl-N-(3,4-methylenedioxyphenyl)urea or thiourea with an aromatic aldehyde, e.g. benzaldehyde, in the presence of an acid at elevated temperatures to obtain the 3,4-dihydro-2(1H)-quinazolinones or 3,4-dihydro-2(1H)-quinazolinthiones which may then be oxidized to the corresponding 3,4-unsaturated compounds.
本发明公开了一种1-烷基-4-苯基和4-(2-噻吩基)-6,7-亚甲二氧基-2(1H)-喹唑啉酮和喹唑啉硫酮类化合物,包括其3,4-二氢衍生物,作为药物,例如作为抗炎药物。这些化合物,例如1-异丙基-4-苯基-6,7-亚甲二氧基-2(1H)-喹唑啉酮和1-异丙基-4-苯基-6,7-亚甲二氧基-2(1H)-喹唑啉硫酮,可以通过将相应的N-烷基-N-(3,4-亚甲二氧基苯基)脲或硫脲与芳香醛(例如苯甲醛)在酸的存在下在高温下反应,得到3,4-二氢-2(1H)-喹唑啉酮或3,4-二氢-2(1H)-喹唑啉硫酮,然后可以将其氧化为相应的3,4-不饱和化合物。