A concise and versatile route to tetrahydro-1-benzazepines carrying [<i>a</i>]-fused heterocyclic units: synthetic sequence and spectroscopic characterization, and the molecular and supramolecular structures of one intermediate and two products
作者:Sergio A. Guerrero、Juan E. Ramírez、Alirio Palma、Justo Cobo、Christopher Glidewell
DOI:10.1107/s2053229619000871
日期:2019.2.1
4SR)‐7‐chloro‐1‐(2‐chloroacetyl)‐4‐hydroxy‐2,3,4,5‐tetrahydro‐1H‐benzo[b]azepine‐2‐carboxylate, (IVa), and methyl (2RS,4SR)‐7‐chloro‐4‐(2‐chloroacetoxy)‐2,3,4,5‐tetrahydro‐1H‐benzo[b]azepine‐2‐carboxylate, C14H15Cl2NO4, (IVb), as the major and minor products, respectively, and further reaction of (IVa) with aminoethanol gave the tricyclic target compound (4aRS,6SR)‐9‐chloro‐6‐hydroxy‐3‐(2‐hydroxyethyl)‐2
从简单的起始原料到带有[ a ]稠合杂环单元的三环四氢-1-苯并ze庚因的简洁,有效和通用的途径据报道。因此,易于获得的2-[((2-烯丙基-4-氯苯基)氨基]乙酸甲酯(I)通过(2 RS,4 SR)-7-氯-2,3,4,5-被转化四氢-1,4-环氧-1-苯并[ b ]氮杂-2-羧酸盐(II),形成关键中间体甲基(2 RS,4 SR)-7-氯-4-羟基-2,3,4 ,5-四氢-1 H-苯并[ b ]氮杂-2-羧酸盐,(III)。(III)的氯乙酰化可提供两种区域异构体甲基(2 RS,4 SR)-7-氯-1-(2-氯乙酰基)-4-羟基-2,3,4,5-四氢-1 H-苯并[ b ]氮杂-2-羧酸盐,(IV a)和甲基(2 RS,4 SR)-7-氯-4-(2-氯乙酰氧基)-2,3,4,5-四氢-1 H-苯并[ b ]氮杂-2-羧酸酯,C 14 H 15 Cl 2 NO 4, (IV b)分别作为主要产物和次要产物,并且(IV