Study on the Effects of Substituents X and Y on the NMR Chemical Shifts of 2-(4-X phenyl)-5-Y Pyrimi

来源 :第十二届全国物理有机化学学术会议 | 被引量 : 0次 | 上传用户:HJ565dgdgd
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The nuclear magnetic resonance(NMR) chemical shift is directly related to the density of the electron cloud around the atom,which is influenced by the substituent directly or indirectly connected to the atom.
其他文献
1.Introution Cyclobutanones and their derivatives are very useful intermediates.Transition-metal catalysts,mainly rhodium[1],palladium[2] and nickel[3] complexes,have been successfully used for the ac
会议
1.Introduction 2.Substrate scope 2.1 HDF of gem-Difluoroalkenes form Aliphatic Aldehdes 2.2 HDF of gem-Difluoroalkenes from Aromatic Aldehydes 2.3 HDF of gem-Difluoroalkenes from α,β-Unsaturated Aldeh
会议
1.Introduction Traditional routes to build the aryl substituted phosphine ligands need at least three steps(Figure 1a,1b).[1]Our stratagy is P atom directed C-H arylation,this late-stage modification
会议
Mechanistic studies utilizing DFT calculations were performed on two reactions involving diborane reagents:Pd-catalyzed diboration of 1,1-disubstituted allenes(Fig.1(a))1 and asymmetric reductive coup
会议
Benzophenone(BP) and anthraquinone(AQ) derivatives have been studied under a variety of conditions.Intermolecular hydrogen abstraction reaction and electron transfer are commonly observed.A new kind o
会议
N-heterocyclic carbenes(NHCs) have been widely used as organocatalysts or ligands in catalytic processes.In recent years,NHCs have been raised as potential systems for capture/activation and conversio
会议
Pictet–Spengler reactions have been extensively utilized in the synthesis of various indole alkaloids.Meanwhile,their mechanistic aspect is really intriguing and has been a controversial research topi
会议
可见光催化是一种清洁高效的反应研究手段,同时因为光催化和传统的加热手段在科学本质上的不同,也产生了许多新的化学[1].本课题组围绕氢气开展脱氢偶联[2]及氮杂环脱氢的研究[3].我们发展了可见光和金属钴协同催化的室温进行的氮杂环脱氢反应,同时利用该方法实现了温和条件下氮杂环化合物的脱氢和加氢的催化循环,并开展了相关的机理研究,展示了氮杂化化合物在储氢材料领域的潜在应用,是其应用到储氢材料领域研究思
During the past decades,transition-metal catalyzed organic transformations have evolved as one of the most robust and widely used methods to construct carbon-carbon,as well as carbon-heteroatom bonds.
会议
温室气体分子二氧化碳(CO2)是廉价易得且可再生的碳一(C1)资源,利用其合成重要的杂环分子具有重要的学术价值和社会意义.1由于CO2在热力学和动力学方面有较高的稳定性,反应活性较低,CO2活化具有巨大的挑战.
会议