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化学学报
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化学学报 ›› 1989, Vol. 47 ›› Issue (11): 1048-1051. 上一篇    下一篇

研究论文

两面针植物中的新生物碱7-去甲6-甲氧基-5,6-二氢白屈菜红碱的晶体结构

陈元柱;杨丽丽;徐本杰;黄治勋   

  1. 中国科学院福建物质结构研究所;广西壮族自治区天然药物研究中心
  • 发布日期:1989-11-15

Crystal structure of 7-demethyl-6-methoxy-5,6-dihydrocheleythrine, a new alkaloid from zanthoxylum

CHEN YUANZHU;YANG LILI;XU BENJIE;HUANG ZHIXUN   

  • Published:1989-11-15

PDF

492

被引次数

2

从两面针植物中分离得新生物碱7-去甲-6-甲氧基-5,6-二氢白屈菜红碱(C~2~1H~1~0O~5N的单晶结构已用直接法解出:空间群为P2t/c,晶能参数:a=14.213(7),b=17.347(3),c=7.513(9)A,β=101.40(13)°,z=4。对I≥3σ(I)的1876个独立反射, 用全矩阵最小二乘法修正到R=0.096和Rπ=0.077(单位权重)。

关键词: 生物碱, 晶体结构测定, 晶胞, 矩阵, 空间群, 最小二乘法, 两面针

The crystal structure of 7-demethyl-6-methoxy-5,6-dihydrochelerythrine, (C21H19NO5) (I), a new alkaloid isolated from Z. nitidum, was determine by x-ray diffraction. The compound crystallizes in a monoclinic system, space group P21/c, with 4 mols. in a unit cell of a = 14.213(7), b = 17.347(3), c = 7.513(9) ? b = 101.40(13)? The structure has been refined by the full matrix least-squares method using 1876 unique reflections with I ?3s(I) and the final residual factors are R = 0.096 (Rw = 0.077).

Key words: ALKALOID, CRYSTAL STRUCTURE DETERMINATION, UNIT CELL, MATRICES, SPACE GROUPS, LEAST SQUARE METHODS, ZANTHOXYLUM NITIDUM

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