Synthesis of 2-aryl-2,3-dihydro-3-piperazinylmethyl-1,5-benzothiazepin-4(5H)-ones and related compounds.
作者:SACHIO OHNO、KIYOSHI MIZUKOSHI、KIHACHIRO IZUMI、KAZUO KATO、MIKIO HORI
DOI:10.1248/cpb.36.551
日期:——
A series of trans- (12) and cis-2-aryl-2, 3-dihydro-3-piperazinylmethy-1, 5-benzothiazepin-4(5H)-ones(13) and related compounds were synthesized. Diethyl arylmethylenemalonates (3) were heated with 2-aminobenzenethiol (4) in the presence of triethylamine hydrochloride to afford trans-2-aryl-3-ethoxycarbonyl-2, 3-dihydro-1, 5-benzothiazepin-4(5H)-ones (7) together with 2-aryl-benzothiazoles (6). Heating of the adducts of 3 and 4 also gave 6 and 7. Reduction of 7 yielded the 3-hydroxymethyl compounds (8), which were converted to the 3-chloromethyl (9), 3-methanesulfonyloxymethyl (10), and 3-(4-toluenesulfonyloxymethyl) compounds (11). Heating of 9-11 with piperazines gave 12 and 13. Optical resolution of the 2-phenyl-3-piperazylmethyl (13a) and 2-phenyl-3-(4-methylpiperazinylmethyl) compounds (13b) afforded (-)-13a, an active metabolite of (-)-13b, and (-)-13b (hydrochloride : BTM-1086), a potent anti-ulcer agent with gastric antisecretory and gastric mucosal blood flow-increasing activities, respectively.
合成了一系列的trans-(12)和cis-2-芳基-2, 3-二氢-3-哌嗪基甲基-1, 5-苯并噻唑并-4(5H)-酮(13)及相关化合物。将二乙基芳基亚甲酰基丙二酸酯(3)与2-氨基苯硫醇(4)在氯化三乙胺的存在下加热,得到了trans-2-芳基-3-乙氧羧基-2, 3-二氢-1, 5-苯并噻唑并-4(5H)-酮(7)以及2-芳基苯并噻唑(6)。3和4的加成物加热同样得到了6和7。对7的还原产生了3-羟甲基化合物(8),这些化合物进一步转化为3-氯甲基(9)、3-甲烷磺酰氧甲基(10)和3-(4-甲基苯磺酰氧甲基)化合物(11)。将9-11与哌嗪加热得到12和13。对2-苯基-3-哌嗪基甲基(13a)和2-苯基-3-(4-甲基哌嗪基甲基)化合物(13b)的光学分离得到(-)-13a,该化合物是(-)-13b的活性代谢产物,以及(-)-13b(盐酸盐:BTM-1086),一种有效的抗溃疡药物,具有抑制胃酸分泌和增加胃黏膜血流的活性。