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有机化学
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有机化学 ›› 1996, Vol. 16 ›› Issue (1): 53-63. 上一篇    下一篇

研究论文

3-乙酰基取代吡咯衍生物的合成及其晶体结构

于联合;明阳福;樊美公;祝英   

  1. 中国科学院感光化学研究所;兰州大学国家应用有机重点实验室
  • 发布日期:1996-02-25

Synthesis and crystal structures of 3-acetyl-substituted pyrroles

YU LIANHE;MING YANGFU;FAN MEIGONG;ZHU YING   

  • Published:1996-02-25

被引次数

3

本文通过Knorr合成法制备了四个3-位乙酰基取代的吡咯衍生物:1, 2-二甲基-4-异丙基-5-苯基-3-乙酰基-吡咯(5a); 1, 2, 4-三甲基-5-对甲氧苯基-3-乙酰基-吡咯(5b); 1, 2, 5-三甲基-4-苯基-3-乙酰基-吡咯(5c); 1, 2, 5-三甲基-4-对甲氧苯基-3-乙酰基-吡咯(5d)。通过红外, 质谱, 核磁等方法对其结构进行了表征。测定了其中三个化合物的晶体结构。对这类吡咯环上4或5-位有芳环取代基时化合物的晶体结构特征进行了扼要讨论, 晶体衍射实验结果表明,4, 5-位上的芳环与吡咯环本身处于非共平面结构。

关键词: 乙酰基, 红外分光光度法, 晶体结构, 中国科学院重大项目基金, 吡咯 P, 质谱法, 核磁共振谱法

Four new 3-acetyl substituted pyrrole derivatives were prepared by Knorr-pyrrole synthetic method: 5a, 1, 2-dimethyl-4-isopropyl-5-phenyl -3-acetyl pyrrole; 5b, 1, 2, 4-trimethyl-5-p-methoxyphenyl-3-acetyl pyrrole; 5c, 1, 2, 5-trimethyl-4-phenyl-3-acetyl pyrrole; 5d, 1, 2, 5- trimethyl-4-p-methoxyphenyl-3-acetyl pyrrole. Their structures were identified by IR, ^1H NMR and MS Spectroscopy. Crystal structures of compound 5a, 5b and 5c were obtained by X-ray analysis. The structure characters of this kind of molecules were discussed. The results show that the phenyl group located in the 4- or 5- position of pyrryl ring are not coplanar with the pyrryl ring.

Key words: INFRARED SPECTROPHOTOMETRY, CRYSTAL STRUCTURE, ACETYL GROUP, MASS SPECTROGRAPHY, PYRROLE P, NMR SPECTROMETRY

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