| Synthesis and Crystal Structure of 9-Pyridyl-1,8-dioxo-2,3,4,5,6,7-hexahydroxanthene |
| |
| 引用本文： | ZHAO Qing-Jiea LIN Hai-Xiaa② HAN Naa CHEN Min-Qinb YANG Ming-Faa a (Department of Chemistry,Shanghai University,Shanghai 200436,China) b (Research Center of Analysis and Measurement,Fudan University,Shanghai 200433,China). Synthesis and Crystal Structure of 9-Pyridyl-1,8-dioxo-2,3,4,5,6,7-hexahydroxanthene[J]. 结构化学, 2005, 24(6): 701-705 |
| |
| 作者姓名： | ZHAO Qing-Jiea LIN Hai-Xiaa② HAN Naa CHEN Min-Qinb YANG Ming-Faa a (Department of Chemistry Shanghai University Shanghai 200436 China) b (Research Center of Analysis and Measurement Fudan University Shanghai 200433 China) |
| |
| 作者单位： | ZHAO Qing-Jiea LIN Hai-Xiaa② HAN Naa CHEN Min-Qinb YANG Ming-Faa a (Department of Chemistry，Shanghai University，Shanghai 200436，China) b (Research Center of Analysis and Measurement，Fudan University，Shanghai 200433，China) |
| |
| 基金项目： | The work was supported by the Development Foundation of Ministry of Education of Shanghai |
| |
| 摘 要： | 1 INTRODUCTION The Koevenagel condensation catalyzed by bases or Lewis acid has been the subject of many synthetic applications since its discovery[1] although the pre- sence of catalyst is not always indispensable[2]. Mo- reover, the reaction of aromatic aldehyde with 1,3- cyclohexanedione under different conditions afforded different products[3～6]. In continuing efforts for the application of 1,3-cyclohexanedione derivatives to construct new heterocycles with biological activi- ties[7…
|
| 关 键 词： | 晶体结构 合成方法 9-氮苯基-1，8-二氧代-2，3，4，5，6，7-六氧杂蒽 X射线分析 |
Synthesis and Crystal Structure of 9-Pyridyl-1,8-dioxo-2,3,4,5,6,7-hexahydroxanthene |
| |
| ZHAO Qing-jie,LIN Hai-Xia,HAN Na,CHEN Min-Qin,YANG Ming-Fa. Synthesis and Crystal Structure of 9-Pyridyl-1,8-dioxo-2,3,4,5,6,7-hexahydroxanthene[J]. Chinese Journal of Structural Chemistry, 2005, 24(6): 701-705 |
| |
| Authors: | ZHAO Qing-jie LIN Hai-Xia HAN Na CHEN Min-Qin YANG Ming-Fa |
| |
| Abstract: | 9-Pyridyl-1,8-dioxo-2,3,4,5,6,7-hexahydroxanthene 3 (C18H17NO3) was prepared by the reaction of 4-pyridinecarboxaldehyde and 1,3-cyclohexanedione using Nafion-H as catalyst. The crystal and molecular structures were studied. The crystal is of orthorhombic, space group Pbcn with a = 20.369(4), b = 14.528(2), c = 9.747(17) (A), V = 2884.3(9) (A)3, Dc = 1.360 g/cm3, Z = 8, F(000) = 1248 and μ(MoKα) = 0.093 mm-1. The final R = 0.0395, wR = 0.1087 for 1458 observed reflections (I > 2σ(I)), and R = 0.1032, wR = 0.1340 for all 2580 reflections. The outer rings of the xanthene groups adopt an almost ideal envelope conformation, and the heterocyclic central ring exhibits a distorted boat conformation. The pyridyl group is rotated with respect to the xanthene system by 87°. |
| |
| Keywords: | crystal structure xathene preparation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
