Discovery of a novel potent Na + /Ca 2+ exchanger inhibitor: design, synthesis and structure–activity relationships of 3,4-dihydro-2(1 H )-quinazolinone derivatives
作者:Hirohiko Hasegawa、Masami Muraoka、Kazuki Matsui、Atsuyuki Kojima
DOI:10.1016/s0960-894x(03)00744-3
日期:2003.10
Design, synthesis and structure-activity relationships for 3,4-dihydro-2(1H)-quinazolinone derivatives with the inhibitoryactivities of the Na(+)/Ca(2+) exchanger are discussed. These studies based on lead compound 1a lead to the discovery of a structurally novel and highly potent inhibitor against the Na(+)/Ca(2+) exchanger 4f (SM-15811), which directly inhibited the Na(+)-dependent Ca(2+) influx
Synthetic studies on quinazoline derivatives. II. The reactions of 2-trichloro- and 2-trifluoroacetamidobenzophenones with primary amines.
作者:MICHIHIRO YAMAMOTO、HISAO YAMAMOTO
DOI:10.1248/cpb.29.2135
日期:——
The reaction of 5-chloro-2-trichloroacetamidobenzophenone (2a) with several primary alkylamines in DMSO gave high yields of 3-substituted 6-chloro-3, 4-dihydro-4-phenyl-4-trichloromethyl-2(1H)-quinazolinones 6, which were found to be formed by base-catalyzed and/or thermal cyclization and simultaneous rearrangement of the isomeric 5-chloro-2-trichloroacetamidobenzophenone alkylimines 5. Both compounds 5 and 6 were obtained when the reaction was effected in benzene. Treatment of the compound 2a with bulky amines such as isopropylamine and cyclohexylamine gave, under similar conditions, the corresponding benzophenone imines 5d and 5e exclusively, and these could be transformed into the quinazolinones 6d and 6e, respectively, on heating in pyridine or HMPT. The reaction of N-substituted trichloroacetamidobenzophenones 2m and 3n with N-(2-aminoethyl) morpholine as well as ammonia in DMSO yielded the 1-alkylaminobenzophenone imines 4m-o, which on treatment with trichloroacetyl chloride were readily cyclized to give the corresponding 1-substituted 4-trichloromethylquinazolinones 6m-o. The trichloromethyl group of the 1-unsubstituted quinazolinones 6 was easily displaced by a nucleophile such as hydride, alkoxide or hydroxide under base catalysis to give the 3, 4-dihydro-2 (1H)-quinazolinone derivative 9, 10 or 11 almost quantitatively, whereas the 1, 3-disubstituted quinazolinone 6o was not affected. The sodium borohydride reduction of the methylimine 5a at room temperature mainly afforded the trichloroacetamidobenzhydrylamine 8a, which underwent thermal cyclization to the quinazolinone 9a via split of chloroform. In contrast, the reaction of 5-chloro-2-trifluoroacetamidobenzophenone (2p) with some primary alkylamines in DMSO produced the trifluoroacetamidobenzophenone alkylimines 5p-r, which on treatment with sodium borohydride could be converted only to 3-substituted 6-chloro-3, 4-dihydro-4-phenyl-2-trifluoromethylquinazolines 15. These procedures were successfully utilized in syntheses of the imidazo [1, 2-c] quinazolinone 16, oxazolo [3, 2-c] quinazolinones 17t and 17v, and 1, 3-oxazino [3, 2-c] quinazolinone 17u.
This invention is to provide quinazolinone derivatives, and their acid salts and quaternary ammonium salts, having an effect of preventing or treating diseases caused by calcium ion overload in cells, such as ischemic heart disease, ischemic cerebral disease and ischemic renal disease, and their usage. The quinazolinone derivatives are represented by the formula:
typically, T represents an oxygen atom; Y represents a phenyl or cyclohexyl group; R¹ represents a hydrogen or chlorine atom; R² represents a hydrogen atom; ring W represents a benzene or pyridine ring; Z represents a group of the formula:
本发明旨在提供喹唑啉酮衍生物及其酸盐和季铵盐,具有预防或治疗细胞中钙离子超载引起的疾病,如缺血性心脏病、缺血性脑病和缺血性肾病的作用及其用途。喹唑啉酮衍生物由式表示:
通常,T 代表氧原子;Y 代表苯基或环己基;R¹ 代表氢原子或氯原子;R² 代表氢原子;环 W 代表苯环或吡啶环;Z 代表式中的基团: