Stereoselective Synthesis of Novel 2-Alkenyl-2,3,4,5-tetrahydro-1,4-epoxy-1-benzazepines and 2-Alkenyl-2,3,4,5-tetrahydro-1H-1-benzazepin-4-ols
作者:Alirio Palma、Lina Acosta Quintero、Manuel Nogueras、Justo Cobo
DOI:10.1055/s-0032-1316808
日期:——
2-allylanilines by a three-step sequence consisting of selective oxidation of aromatic secondary amines, intramolecular nitrone–olefin 1,3-dipolar cycloaddition, and reductive cleavage. The intramolecular 1,3-dipolar cycloaddition is stereoselective favoring the exo-cycloadducts (ratio exo/endo 2–3:1). The stereochemistry was determined by exhaustive NMR analysis and X-ray diffraction. New series of polyfunctionalized
摘要 新系列的多官能化2,3,4,5-四氢-1,4-环氧-1-苯并ze庚因和2,3,4,5-四氢-1 H -1-苯并ze庚因-4-醇在C2处被2-从相应的N-烯基取代的[异戊烯基,反-肉桂基,(E)-己-2-烯基]开始合成甲基丙-1-烯基,(E)-苯乙烯基和(E)-戊-1-烯基2-烯丙基苯胺由三步顺序组成,包括芳族仲胺的选择性氧化,分子内的硝酮-烯烃1,3-偶极环加成和还原裂解。分子内1,3-偶极环加成是立体选择性有利于外-cycloadducts(比外型/内型2–3:1)。立体化学通过详尽的NMR分析和X射线衍射确定。 新系列的多官能化2,3,4,5-四氢-1,4-环氧-1-苯并ze庚因和2,3,4,5-四氢-1 H -1-苯并ze庚因-4-醇在C2处被2-从相应的N-烯基取代的[异戊烯基,反-肉桂基,(E)-己-2-烯基]开始合成甲基丙-1-烯基,(E)-苯乙烯基和(E)-戊-1-烯基