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学科主题: 药学
题名:
Some interesting CH 2CH (3) spin systems in several diethyl malonate indene derivatives studied with NMR and molecular modeling
作者: Zhang Long1; He WeiWei1; Liang YongMin2; Cui YuXin1
关键词: electrophilic cyclization ; spin-spin coupling ; signal multiplicity ; molecular modeling ; spin system ; aromatic ring
刊名: SCIENCE IN CHINA SERIES B-CHEMISTRY
发表日期: 2009-07-01
DOI: 10.1007/s11426-009-0032-0
卷: 52, 期:7, 页:937-942
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
关键词[WOS]: CYCLIZATION
英文摘要:

While studying the electrophilic cyclization of acetylenic malonates in synthesizing malonate indene derivatives with high regio and stereo-selectivity, we found that the CH2 and CH3 protons of two COOCH2CH3 groups in some diethyl malonate indene derivatives showed very interesting spin-spin coupling and signal multiplicity. To explain those phenomena, we synthesized several diethyl malonate indene derivatives, and then used H-1 NMR spectra and molecular modeling to investigate the CH 2CH (3) spin system of these two COOCH2CH3 groups in detail. The results showed that the spin systems of CH 3CH (2) of the two COOCH2CH3 groups in those compounds may exist in different froms (AMX (3), ABX (3) and A (2) X (3)), and the effect of the aromatic ring induced by the phenyl group at the end of the triple bond is the main reason responsible for those phenomena.

语种: 英语
WOS记录号: WOS:000267396300014
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/54040
Appears in Collections:北京大学药学院_期刊论文

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作者单位: 1.Peking Univ, Sch Pharmaceut Sci, State Key Lab Nat & Biomimet Drugs, Beijing 100191, Peoples R China
2.Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China

Recommended Citation:
Zhang Long,He WeiWei,Liang YongMin,et al. Some interesting CH 2CH (3) spin systems in several diethyl malonate indene derivatives studied with NMR and molecular modeling[J]. SCIENCE IN CHINA SERIES B-CHEMISTRY,2009,52(7):937-942.
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