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Syntheses and Crystal Structures of Methyl 2-(4,5-Dibromo-1-methylpyrrole-2-carbonylamino)-3-phenylpropanoate and 4,5-Dibromo-1-methyl-2- trichloroacetylpyrrole
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作者 ZENG Xiang-Chao GU Jian XU Shi-Hai LIU Po-Run 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第2期153-158,共6页
4,5-Dibromo-1-methyl-2-trichloroacetylpyrrole Ⅰ, prepared by the reaction of 1-methyl-2-trichloroacetylpyrrole with Br2 in 98.6 % yield, was condensed with methyl L-2-amino-3- phenylpropanoate to afford methyl 2-(4,... 4,5-Dibromo-1-methyl-2-trichloroacetylpyrrole Ⅰ, prepared by the reaction of 1-methyl-2-trichloroacetylpyrrole with Br2 in 98.6 % yield, was condensed with methyl L-2-amino-3- phenylpropanoate to afford methyl 2-(4,5-dibromo-1-methylpyrrole-2-carboxmido)-3-phenylpropanoate Ⅱ in 90.8% yield. Crystal data for Ⅰ: monoclinic system, space group P21/c with a = 8.595(3), b = 10.900(4), c = 12.321(5) ,A°,β = 92.292(7)°, V = 1153.4(8)A°^3, Dc = 2.213 g/cm^3, F(000) = 728, CTH4Br2Cl3NO, Mr = 384.28, λ = 0.71073 A°, μ(MoKa) = 7.688 mm^-1, Z = 4, R = 0.0338 and wR2 = 0.0840 for 1963 observed reflections with I 〉 2a(I). Crystal data for Ⅱ: monoclinic system, space group P21 with a = 4.886(2), b = 15.921(8), c = 11.635(6) A°,β = 101.803(9)°, V = 885.9(7) A°^3, Dc = 1.665 g/cm^3, F(000) = 440, C16H16Br2N2O3, Mr = 444.13, λ = 0.71073 A°, μ(MoKa) = 4.590 mm^-1, Z = 2, R = 0.0335 and wR2 = 0.0837 for 3191 observed reflections with I 〉 2σ(I). The crystal structure reveals that compound Ⅱ forms the one-dimensional chain structure via the intermolecular hydrogen bonds of N(2)-H…O(1). 展开更多
关键词 methyl 2-(4 5-dibromo-1-methylpyrrole-2-carbonylamino)-3-phenylpropanoate synthesis crystal structure 4 5-dibromo-1-methyl-2-trichloroacetylpyrrole
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