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Two chiral phosphoramidates,(R)-(-)-1,1'-binaphthyl-2,2'-dihydroxy-N-[α-(S)-methylbenzyl] phosphoramidate and (-)-1,1'-biphenyl-2,2'-dihydroxy-N-[α-(S)-methylbenzyl]-phosphoramidate were synthesized.Their crystal structures were determined by X-ray single crystal diffraction analysis.The phosphoramidate molecules are self-associated by inter-molecular N-H...O = P hydrogen bonds and aromatic edge to face interactions. 相似文献
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Solid state Michael addition reaction of indole with α,β-unsaturaled carbonyl compounds was carried out,by which a series of compounds containing three different heterocyclic groups binding to one carbon atom were obtained.In the presence of Lewis acid,indole could undergo the solid state condensation reaction with aromatic ketones and aldehydes or quinones.The solid state reaction showed higher selectivity and yield than solution reaction The structures of products were identified by IR,1H NMR,MS,elemental analysis and X-ray crystal analysis.The reaction mechanism was also proposed. 相似文献
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微环境条件影响的光化学反应研究进展 总被引:2,自引:0,他引:2
对近年来微环境条件影响的光反应化学反应研究和一综合评述,包括主体-客体络合物,晶格控制物Lewis酸络合物,电荷转移络合物,胶束以及吸附在硅胶或分子筛表面等体系光化学反应方面取得的重要成果,这类微环境条件影响的光化学反应具有较高的选择性和专一性,参考文献15篇。 相似文献
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1 INTRODUCTION Optically active oxazolines have been extensi- vely used as valuable chiral ligands for transition metals in asymmetric catalysis[1]. The design and syntheses of new chiral oxazoline ligands have inspired many scientists to work with great efforts during the recent years. Our interest has been focus- ed on the studies of enantioselective transition- metal catalysis of heterocyclic ligands. In the pre- sent work, we choose o-hydroxyphenyloxazoline ligand for it has a rigi… 相似文献
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乙酰基香豆素及其衍生物与吲哚的固相光反应研究 总被引:1,自引:1,他引:0
乙酰基香豆素及其衍生物与吲哚的固相光反应研究杜大明,王永梅,孟继本,周秀中张慧萍(南开大学化学系,天津,300071)(云南师范大学化学系)关键词香豆素,吲哚,固相光反应近年来固相光化学发展非常迅速,引起国内外学者的关注[1~3].我们研究了异种分子... 相似文献
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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, 利用1-(噻吩-2-基)-2-重氮基乙酮加热分解生成的噻吩-2-基烯酮参与的Staudinger反应合成了一系列3-(噻 吩-2-基)-β-内酰胺衍生物, 并研究了噻吩-2-基烯酮参与的Staudinger反应的立体选择性. 实验结果表明噻吩-2-基烯酮是比苯基烯酮更富电子的Moore烯酮, 其电子性质介于对甲氧基苯基烯酮和对甲基苯基烯酮之间. 相似文献
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The electron impact mass spectra of ten new C2-symmetric chiral bis(oxazoline) and bis(thiazoline) have been studied. Bis(thiazoline) and bis(oxazoline) possess the same fragmentation mechanism under EI conditions. An unusual fragmentation pathway has been found in the compounds studied. Due to the presence of phenyl group, compounds 6 and 10 undergo a new fragmentation pathway except for the common way as the other eight compounds.Mass analyzed ion kinetic energy spectra experiments and high resolution accurate mass measurement were conducted to confirm the proposed fragmentation pathways. 相似文献