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Novel supramolecular organocatalysts of hydroxyprolinamide based on calix[4]arene scaffold for the enantioselective Biginelli reaction

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Science China Chemistry 2011年第11期54卷 1726-1734页

作者： LI ZhengYi XING HuaiJie HUANG GuoLi SUN XiaoQiang jiang juli WANG LeYong Key Laboratory of Fine Petrochemical Engineering School of Petrochemical Engineering Changzhou University Changzhou 213164 China Institute of Chemical Biology and Drug Innovation School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China

A series of novel supramolecular organocatalysts of hydroxyprolinamide based on the upper rim of calix[4]arene scaffold have been developed to catalyze enantioselective multi-component Biginelli reaction. Under the optimal conditions, the reactions occurred with moderate-to-excellent enantioselectivities (up to 98% ee). A plausible transition state constructed by the supra- molecular interaction of hydrogen bond and cation-π between catalysts and substrates has been proposed.

关键词： supramolecular organocatalyst calixarene hydroxyprolinamide enantioselective Biginelli reaction

以Tröger碱大环为例分析多手性中心大环的立体异构体

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大学化学 2024年第7期39卷 394-397页

作者：石聪浩王冉冉强琚莉王乐勇南京大学化学化工学院南京210023

立体异构现象是有机化学中重要的异构现象之一,具有重要的研究和教学意义。本文将以Tröger碱单元构筑的超分子大环为例,结合实验结果,探讨具有多手性中心大环的立体异构体。

关键词：立体异构体手性大环 Tröger碱

Chiral selection of Troger's base-based macrocycles with different ethylene glycol chains length in crystallization

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Chinese Chemical Letters 2023年第7期34卷 127-130页

作者： Haohui Feng Yuan Chen Ranran Wang Pengbo Niu Conghao Shi Zhen Yang Ming Cheng juli jiang Leyong Wang jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Maanshan High-Tech Research Institute of Nanjing University Maanshan 238200China The Cancer Hospital of the University of Chinese Academy of Sciences(Zhejiang Cancer Hospital) Institute of Basic Medicine and Cancer(IBMC)Chinese Academyof SciencesHangzhou310022China

In the present work,two Troger's base-based macrocycles(TBBMs)with different bridging ethylene glycol chains(T1,n=1;T3,n=3)were successfully synthesized and studied via the crystal *** two TBBMs possess rare rectangular-like cavities and show chiral selection during the crystallization.T1with short glycol chain(n=1)crystallized as racemates,while T3 with long glycol chain(n=3)was found as meso *** contrast to T1 and T3,for T2(n=2)both rac-T2 and meso isomer R2NS2N-T2has been observed in our previous ***,the synthesis of new TBBMs T1 and T3 with different bridging ethylene glycol chains not only makes the study of TBBMs more systematically,but also helps to understand the relationship between the size of the rectangular cavity and the chiral selection of Troger's base-based macrocycles during their crystallization.

关键词： Supramolecular macrocycle Tr?ger’s base Chiral selection Rectangular cavity Glycol chains

Binaphthyl-bridged bis-imidazolinium salts as N-heterocyclic carbene ligand precursors in the palladium-catalyzed Heck reaction

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Science China Chemistry 2011年第6期54卷 951-956页

作者： WU Hui, JIN Can, HUANG GuoLi, WANG LianJun, jiang juli & WANG LeYong Key Laboratory of Mesoscopic Chemistry of Ministry of Education School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China Key Laboratory of Mesoscopic Chemistry of Ministry of Education School of Chemistry and Chemical Engineering Nanjing University Nanjing China

Two new bis-imidazolinium salts (4a, 4b) have been synthesized as precursors of N-heterocyclic carbenes (NHCs) from the commercially available (R)-2,2′-dihydroxy-1,1′-binaphthalene. The two bis-imidazolinium salts were used as efficient precursor of NHC ancillary ligands in the palladium-catalyzed Heck reaction. Good to excellent yields and high stereoselectivities were obtained with ethyl acrylate, acrylonitrile, and acrylamide as starting materials. The structure of bis-imidazolinium salt 4b was further characterized by single crystal X-ray diffraction analysis.

关键词： N-heterocyclic carbenes Heck reaction palladium imidazolinium salts

Mechanistic Study of Cu-Catalyzed Cross-Dehydrogenative Coupling Reaction of Thiazoles with THF

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Mechanistic Study of Cu-Catalyzed Cross-Dehydrogenative Coup...

Chiral selection of Tr?ger's base-based macrocycles with different ethylene glycol chains length in crystallization

中国化学会第十二届全国量子化学会议

作者： Yuping Cai juli jiang Zhao-Xu Chena Key Laboratory of Mesoscopic Chemistry of MOE Institute of Theoretical and Computational ChemistrySchool of Chemistry and Chemical EngineeringNanjing University Center for Multimolecular Chemistry School of Chemistry and Chemical EngineeringNanjing University

The cleavage and functionalization of azoles C-H bonds have attracted considerable attention due to the promising transformation into valuable compounds[1].Recently we studied the reaction mechanism of thiazoles with THF using density functional theory B3LYP[2]method with the Lanl2DZ basis set for Cu and 6-31G*for other *** results reveal that entropy plays role in the *** of SO4-·and organocopper complex are two important *** study may shed new light on the mechanism of organic synthesis of many valuable compounds through breaking C-H bond in azoles.

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Chinese Chemical Letters 2023年第7期34卷 153-156页

作者： Haohui Feng Yuan Chen Ranran Wang Pengbo Niu Conghao Shi Zhen Yang Ming Cheng juli jiang Leyong Wang jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing University The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital) Institute of Basic Medicine and Cancer (IBMC)Chinese Academy of Sciences Maanshan High-Tech Research Institute of Nanjing University

In the present work, two Tr?ger’s base-based macrocycles(TBBMs) with different bridging ethylene glycol chains(T1, n = 1; T3, n = 3) were successfully synthesized and studied via the crystal analysis. These two TBBMs possess rare rectangular-like cavities and show chiral selection during the crystallization. T1with short glycol chain(n = 1) crystallized as racemates, while T3 with long glycol chain(n = 3) was found as meso isomer. In contrast to T1 and T3, for T2(n = 2) both rac-T2 and meso isomer R2NS2N-T2has been observed in our previous report. Thus, the synthesis of new TBBMs T1 and T3 with different bridging ethylene glycol chains not only makes the study of TBBMs more systematically, but also helps to understand the relationship between the size of the rectangular cavity and the chiral selection of Tr?ger’s base-based macrocycles during their crystallization.

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Investigation and optimization of high-valent Ta-doped SrFeO_(3-δ)as air electrode for intermediate-temperature solid oxide fuel cells

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International Journal of Minerals,Metallurgy and Materials 2024年第9期31卷 2102-2109页

作者： Shanshan jiang Hao Qiu Shaohua Xu Xiaomin Xu Jingjing jiang Beibei Xiao Paulo Sérgio Barros juliao) Chao Su Daifen Chen Wei Zhou School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212100China WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerth WA6102Australia Institute of Analysis and Testing Beijing Academy of Science and TechnologyBeijing 100089China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

To explore highly active and thermomechanical stable air electrodes for intermediate-temperature solid oxide fuel cells(ITSOFCs),10mol%Ta5+doped in the B site of strontium ferrite perovskite oxide(SrTa_(0.1)Fe_(0.9)O_(3-δ),STF)is investigated and *** effects of Ta^(5+)doping on structure,transition metal reduction,oxygen nonstoichiometry,thermal expansion,and electrical performance are evaluated *** 10mol%Ta^(5+)doping,the thermal expansion coefficient(TEC)decreased from 34.1×10^(-6)(SrFeO_(3-δ))to 14.6×10^(-6) K^(-1)(STF),which is near the TEC of electrolyte(13.3×10^(-6) K^(-1) for Sm_(0.2)Ce_(0.8)O_(1.9),SDC),indicates excellent thermomechanical *** 550-750℃,STF shows superior oxygen vacancy concentrations(0.262 to 0.331),which is critical in the oxygen-reduction reaction(ORR).Oxygen temperature-programmed desorption(O_(2)-TPD)indicated the thermal reduction onset temperature of iron ion is around 420℃,which matched well with the inflection points on the thermos-gravimetric analysis and electrical conductivity *** 600℃,the STF electrode shows area-specific resistance(ASR)of 0.152Ω·cm^(2) and peak power density(PPD)of 749 mW·cm^(-2).ORR activity of STF was further improved by introducing 30wt%Sm_(0.2)Ce_(0.8)O_(1.9)(SDC)powder,STF+SDC composite cathode achieving outstanding ASR value of 0.115Ω·cm2 at 600℃,even comparable with benchmark cobalt-containing cathode,Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2)O_(3-δ)(BSCF).Distribution of relaxation time(DRT)analysis revealed that the oxygen surface exchange and bulk diffusion were improved by forming a composite *** 650℃,STF+SDC composite cathode achieving an outstanding PPD of 1117 mW·cm^(-2).The excellent results suggest that STF and STF+SDC are promising air electrodes for IT-SOFCs.

关键词： strontium ferrite-based perovskite Ta doping composite cathode intermediate-temperature solid oxide fuel cells

能量连续传递的超分子人工光捕获系统构筑及其在光催化反应中应用

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有机化学 2020年第1期40卷 243-244页

作者： Pangannaya Srikala 强琚莉王瑞兵南京大学化学化工学院南京210023 澳门大学中华医药研究院中国澳门999078

光捕获系统在自然界光合作用过程中起着至关重要的作用.模拟自然界的光捕获体系,在生物成像、发光器件、光催化以及解决人类面临的能源问题等方面均具有重要意义[1].目前,在水相中构筑高效的人工光捕获系统已取得一系列重要进展[2].然而... 详细信息

光捕获系统在自然界光合作用过程中起着至关重要的作用.模拟自然界的光捕获体系,在生物成像、发光器件、光催化以及解决人类面临的能源问题等方面均具有重要意义[1].目前,在水相中构筑高效的人工光捕获系统已取得一系列重要进展[2].然而,为了更好地理解并模拟自然界中以多通道信息通讯为特征的捕光天线系统[3],构筑具有多步连续能量转移特征并能实现光能到化学能转化的人工光捕获体系仍然是一项具有挑战性的工作.

关键词：信息通讯光合作用过程发光器件人工光能量转移超分子生物成像光催化反应

Novel pseudo[2]rotaxanes constructed by dibenzyl tetramethylene bis-carbamate derivatives and per-ethylated pillar[5]arene

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Novel pseudo[2]rotaxanes constructed by dibenzyl tetramethyl...