Efficient Synthesis and Gastric (H+/K+)-ATPase-Inhibitory Activity of 2-Aryl-4,5-dihydro-1H-thieno(3,2-e)benzimidazoles.
作者:Koichi HOMMA、Tatsuya WATANABE、Toru IIJIMA、Michihisa YATO、Kenji MATSUKI、Tsunehisa NOTO、Akihiko ISHIDA
DOI:10.1248/cpb.45.1945
日期:——
A series of 2-aryl-4, 5-dihydro-1H-thieno[3, 2-e]benzimidazoles (1, 2) was prepared by condensation of 5-acylamino-4, 5, 6, 7-tetrahydrobenzo[b]thiophen-4-ones (9, 10) with ammonium acetate under azeotropic reaction conditions. Various congeners, N-methyl and N-phenyl analogues (3-5), 4, 5-dihydro-1H-thieno[2, 3-e]benzimidazoles (6), 4, 5-dihydro-1H-thieno[2, 3-g]benzoxazoles (7), and 4, 5-dihydro-1H-thieno[2, 3-g]benzothiazoles (8), were also prepared. Several compounds in this series were shown to be K+-competitive inhibitors of the gastric (H+/K+)-ATPase and more potent inhibitors than SK&F-96067, 3-butyryl-8-methoxy-4-(2-tolylamino)quinoline, on pentagastrin-stimulated acid secretion in chronic gastric fistula rats after intraduodenal administration.
一系列2-芳基-4, 5-二氢-1H-噻烷[3, 2-e]苯并咪唑(1, 2)是通过在气相反应条件下将5-酰氨基-4, 5, 6, 7-四氢苯并[b]噻吩-4-酮(9, 10)与醋酸铵缩合制备的。此外,还制备了各种同类化合物,包括N-甲基和N-苯基类似物(3-5)、4, 5-二氢-1H-噻烷[2, 3-e]苯并咪唑(6)、4, 5-二氢-1H-噻烷[2, 3-g]苯并噁唑(7)和4, 5-二氢-1H-噻烷[2, 3-g]苯并噻唑(8)。在这一系列的化合物中,几种被证明是K+竞争抑制剂,能够抑制胃(H+/K+)-ATP酶,且在慢性胃瘘鼠中,经过十二指肠给药后,对五肽胃素刺激的酸分泌的抑制活性比SK&F-96067(3-丁酰基-8-甲氧基-4-(2-苯基氨基)喹啉)更强。