Synthesis and Crystal Structure of Methyl 3-(5-Bromo-1-ethyl-1H-indole-3-carbonyl)aminopropionate  

作　　者：李恺平 郑乐 曾向潮 胡芳 

机构地区：[1]Department of Chemistry,Jinan University

出　　处：《Chinese Journal of Structural Chemistry》2011年第7期1044-1048,共5页结构化学（英文）

基　　金：supported by the Natural Science Foundation of Guangdong Province (No.06300581)

摘　　要：Methyl 3-（5-bromo-l-ethyl-lH-indole-3-carbonyl）aminopropionate has been synthesized by the acylation of 5-bromo-3-trichloroacetylindole with β-alanine methyl ester, followed by alkylation with ethyl iodide, in 82.6% yield. Its crystal structure was gotten and determined by X-ray diffraction method. The crystal is of monoclinic, space group P2/c with a = 11.7927（8）, b = 14.9342（8）, c = 9.0060（5） A, β = 101.558（6）°, V = 1553.93（16） A3, Z = 4, Dc= 1.510 g/cm3, 2 = 0.71073 A,μ（MoKa） = 2.656 mm-1, Mr = 353.22 and F（000） = 720. The structure was refined to R = 0.0401 and wR = 0.0825 for 1704 observed reflections with I 〉 2σ（I）. In the crystal structure, intermolecular N（2）-H（2）...O（1） hydrogen bond and weak intermolecular bonds （C（1）-H（1）...O（1） and C（10）-H（10B）-O（2）） are formed, and π-π stacking also exists.Methyl 3-（5-bromo-l-ethyl-lH-indole-3-carbonyl）aminopropionate has been synthesized by the acylation of 5-bromo-3-trichloroacetylindole with β-alanine methyl ester, followed by alkylation with ethyl iodide, in 82.6% yield. Its crystal structure was gotten and determined by X-ray diffraction method. The crystal is of monoclinic, space group P2/c with a = 11.7927（8）, b = 14.9342（8）, c = 9.0060（5） A, β = 101.558（6）°, V = 1553.93（16） A3, Z = 4, Dc= 1.510 g/cm3, 2 = 0.71073 A,μ（MoKa） = 2.656 mm-1, Mr = 353.22 and F（000） = 720. The structure was refined to R = 0.0401 and wR = 0.0825 for 1704 observed reflections with I 〉 2σ（I）. In the crystal structure, intermolecular N（2）-H（2）...O（1） hydrogen bond and weak intermolecular bonds （C（1）-H（1）...O（1） and C（10）-H（10B）-O（2）） are formed, and π-π stacking also exists.

关 键 词：methyl 3-（5-bromo-1-ethyl-lH-indole-3-carbonyl）aminopropionate INDOLE synthesis crystal structure 

分 类 号：O621.2[理学—有机化学]