国家自然科学基金(20472005)

作品数:7被引量:52H指数:2
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相关作者:许家喜梁勇杜大明焦雷王鼎更多>>
相关机构:北京大学更多>>
相关期刊:《化学进展》《化学学报》《Chemical Research in Chinese Universities》《Chinese Journal of Chemistry》更多>>
相关主题:ALKYLREARRANGEMENTFRAGMENTATION选择性非对映选择性更多>>
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3-(噻吩-2-基)-β-内酰胺的合成及其立体化学被引量:2
《化学学报》2007年第16期1643-1648,共6页李伯男 梁勇 焦雷 胡立博 杜大明 许家喜 
国家自然科学基金(No.20472005)资助项目.
Staudinger反应是合成β-内酰胺类化合物最重要的方法之一.3-(噻吩-2-基)-β-内酰胺是一类重要的β-内酰胺类衍生物.发展了一种从1-(噻吩-2-基)-4,4,4-三氟-1,3-丁二酮和对甲苯磺酰叠氮方便地制备1-(噻吩-2-基)-2-重氮基乙酮的新方法,利...
关键词:Β-内酰胺 Staudinger反应 立体选择性 重氮酮 烯酮 
微波与有机化学反应的选择性被引量:48
《化学进展》2007年第5期700-712,共13页许家喜 
国家自然科学基金项目(No.20472005)资助
本文综述了微波辅助下有机化学反应的选择性,包括化学选择性、区域选择性、顺反选择性、非对映选择性和对映选择性,与传统加热条件下反应选择性的区别。讨论了微波对有机化学反应选择性的影响。从文献报道的结果来看,虽然观察到了一些...
关键词:微波 微波效应 反应选择性 化学选择性 区域选择性 顺反选择性 非对映选择性 对映选择性 立体选择性 
Mass Spectral Fragmentation of (S,S)-N,N′-Bis [1-(hydroxymethyl)alkyl]anthracene/Naphthalene-1,8-dicarboxamides under Electron Impact Ionization Conditions
《Chemical Research in Chinese Universities》2006年第6期756-759,共4页JIAO Peng ZHANG Qi-han XU Jia-xi 
Supported in part by the National Natural Science Foundation of China(No. 20472005).
The mass spectrometric fragmentation of ( S, S) -N, N'-bis [ 1- (hydroxymethyl) alkyl] anthracene/naphthalene-1, 8-dicarboxamides was investigated with the aid of mass-analyzed ion kinetic energy spectrometry and...
关键词:Biscarboxamide EI-MS FRAGMENTATION CYCLIZATION 
Mass Spectrometric Fragmentation of 1-(Benzyloxycarbonyl)amino-2-alkyl/cycloalkyl Thioacetates:a Thioester Pyrolysis-type Rearrangement under Electron Impact Ionization
《Chinese Chemical Letters》2006年第8期1069-1072,共4页Shu XU Jia Xi XU 
The mass spectrometric fragmentation of 1-(benzyloxycarbonyl)amino-2-alkyl/cycloalkyl thioacetates has been studied with the aid of mass-analysed ion kinetic energy spectrometry under electron impact ionization. All...
关键词:Electron impact ionization mass spectrometry REARRANGEMENT thioacetate. 
新型含硫肿瘤坏死因子类肽抑制剂的合成与活性被引量:1
《高等学校化学学报》2006年第4期669-671,共3页王鼎 张奇涵 许家喜 
国家自然科学基金(批准号:20472005)资助
Tumor necrosis factor is one of the important cell factors,which can regulate pro-imflammatory.On the basis of the known and efficient peptidomimetic inhibitors of tumor necrosis factor as the leading compounds,novel ...
关键词:肿瘤坏死因子 多肽 类肽抑制剂 
Further Investigation on the Rearrangement Mechanism of Reactions of 1,5-Benzothiazepines with Ethoxycarbonylcarbene
《Chemical Research in Chinese Universities》2006年第1期36-39,共4页WU Chun-zan HUANG Jia-xing ZHANG Qi-han XU Jia-xi 
SupportedpartlybytheNationalNaturalScienceFoundationofChina(Nos.20272002and20472005),MinistryofEducationofP.R.China(SRFforROCSandEYTP)andPekingUniversity(PresidentGrant).
The reactions of 2,3-dihydro-1,5-benzothiazepines with ethoxyearbonylcarbene undergo complex rearrangements to produce rlng-opening and ring contraction products. Previously it was presumed that the different products...
关键词:1 5-BENZOTHIAZEPINE Ethoxycarbonylcarbene REARRANGEMENT RING-CONTRACTION RING-OPENING 
Chiral Oxazaborolidine-catalyzed Asymmetric Borane Reduction of Alkyl 4-Dialkylaminophenyl Ketones被引量:1
《Chinese Journal of Chemistry》2005年第10期1457-1461,共5页许家喜 蓝宇 魏铁铮 张奇涵 
Project supported partly by the National Natural Science Foundation of China (Nos. 20272002 and 20472005) and the Excellent Young Teacher Program and the Scientific Research Foundation for the Returned 0versea Chinese Scholars of Ministry of Education of China.
A series of alkyl 4-dialkylaminophenyl ketones were prepared and reduced asymmetrically by borane under the chiral oxazaborolidine catalysis. The results indicate that the ketones show a more obvious subsfituent effec...
关键词:asymmetric catalysis BORANE enantioselective synthesis KETONE OXAZABOROLIDINE substituent effect 
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