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PHOTOINDUCED ADDITION REACTIONS OF CHLORANIL WITH FURAN DERIVATIVES 被引量:3
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作者 Jian Hua XU and Jian Wei XU Department of Chemistry. Nanjing University, Nanjing, 210008 Bao Zeng YAN and Han Cheng YUAN Department of Applied Chemistry. Beijing Insititute of Chemical Technology. Beijing, 100029 《Chinese Chemical Letters》 SCIE CAS CSCD 1991年第11期831-834,共4页
Photoinduoed reaction of chloranil (TCBQ) with 2-methylfuran la and 2,5-dimethylfuran 1b in benzene gave addition products 2a and 2b respecvely together with tetrachlorohydroquinone 3. A mechanism of sequential electr... Photoinduoed reaction of chloranil (TCBQ) with 2-methylfuran la and 2,5-dimethylfuran 1b in benzene gave addition products 2a and 2b respecvely together with tetrachlorohydroquinone 3. A mechanism of sequential electron and proton transfer from la or 1b to ~3TCBQ followed by coupling of the furfuryl and semiquinone radical pairs was proposed and is evidenced by the photo-CIDNP studies of the TCBQ-1a and TCBQ-1b systems. 展开更多
关键词 TCBQ PHOTOINDUCED ADDITION reactionS OF CHLORANIL WITH FURAN derivativeS TCI
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LOW-VALENT TITANIUM INDUCED REACTION OF CARBOXYLIC DERIVATIVES WITH NITRO COMPOUNDS 被引量:1
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作者 Da Qing SHI Department of Chemistry,Xuzhou Teachers College,Xuzhou 221009Wei Xing CHEN Department of Chemistry,Nanjing University,Nanjing 210008 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第8期679-680,共2页
The intermolecular reaction of carboxylic derivatives with nitro compounds induced by titanium tetrachloride and zine powder was studied.
关键词 CHEN ZN LOW-VALENT TITANIUM INDUCED reaction OF CARBOXYLIC derivativeS WITH NITRO COMPOUNDS
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Studies on the Reaction of Vinyl Triazole Derivatives with Hydroxylamine
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作者 Gui Yu JIN Guo Feng ZHAO +2 位作者 Zhong Fa LIU Jin REN Yu Chang LI (Institute of Elemento-Organic Chemistry, National Key Laboratory of Elemento-Organic Chemistry.Nankai University, Tianjin 30007) 《Chinese Chemical Letters》 SCIE CAS CSCD 1997年第6期467-470,共4页
In this paper the reaction of vinyl triazole derivatives with hydroxylamine hydrochloride under the action of sodium carbonate was studied. The result indicated that cyclization took place and new heterocyclic compoun... In this paper the reaction of vinyl triazole derivatives with hydroxylamine hydrochloride under the action of sodium carbonate was studied. The result indicated that cyclization took place and new heterocyclic compounds of 1,2-oxazocyclopentanes were obtained. 展开更多
关键词 PPM OH NH Studies on the reaction of Vinyl Triazole derivatives with Hydroxylamine Ph IR
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Palladium (0) Catalysed Rearrangement and Aromatisation Reactions of Gibberellin A_3 Derivatives
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作者 ChristineL.WILLIS 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 1999年第S1期114-114,共1页
关键词 GA Catalysed Rearrangement and Aromatisation reactions of Gibberellin A3 derivatives PALLADIUM
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A PRELIMINARY STUDY ON THE THEORY OF THE SECOND AND THIRD ORDER DERIVATIVE ADSORPTION CHRONOPOTENTIOMETRY FOR A REVERSIBLE REACTION
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作者 Hong Guang ZHANG Wen Rui JIN Department of Chemistry,Shandong University,Jinan,250100,ShandongFu Song HUANG Department of Computer Science,Shandong University,Jinan,250100,Shandong 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第3期257-258,共2页
The equations of the second and third order derivative curves of time with respect to potential for a reversible process in adsorption chronopotentiometry are derived and experimentally verified.
关键词 In RT A PRELIMINARY STUDY ON THE THEORY OF THE SECOND AND THIRD ORDER derivative ADSORPTION CHRONOPOTENTIOMETRY FOR A REVERSIBLE reaction
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Study on the reactions of fluoroalkanesulfonyl azides with pyridine and its derivatives
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《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 1999年第S1期234-234,共1页
关键词 OC Study on the reactions of fluoroalkanesulfonyl azides with pyridine and its derivatives
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THE ELECTRON SPIN RESONANCE STUDY ON PRIMARY PHOTOCHEMICAL REACTION OF HEMATOPORPHYRIN DERIVATIVE
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作者 纪极英 辛淑敏 梁金虎 《Science China Chemistry》 SCIE EI CAS 1987年第11期1160-1169,共10页
The rate of oxygen consumption and the yield of free radical anion of hematoporphyrin derivative (HPD) in aqueous solutions of HPD and pyrocatechol were measured by the probe 2,2,6,6-tetramethyl4-piperidone-1-oxyl.It ... The rate of oxygen consumption and the yield of free radical anion of hematoporphyrin derivative (HPD) in aqueous solutions of HPD and pyrocatechol were measured by the probe 2,2,6,6-tetramethyl4-piperidone-1-oxyl.It has been found that both singlet oxygen and free radical mechanisms exist simultaneously in primary photochemical reactions, and there is a competition between both mechanisms. When the oxygen concentration in solutions comes down to 12-14% of the stanting level, the predominant mechanism can be changed from the singlet oxygen to the free radical.Whether HPD exists in aggregation state is very important to photosensitization mechanisms.In the presence of the aggregation state of HPD, the predominant mechanism is the free radical,and photosensitization effects of HPD are all the better. 展开更多
关键词 HPD THE ELECTRON SPIN RESONANCE STUDY ON PRIMARY PHOTOCHEMICAL reaction OF HEMATOPORPHYRIN derivative
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A novel regio-and stereo-specific hydrohalogenation reaction of 2-alkynoic acids and their derivatives
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作者 LU,Xi-Yan ZHU,Guo-Xin MA,Sheng-Ming Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,Shanghai 200032 《Chinese Journal of Chemistry》 SCIE CAS CSCD 1993年第3期267-271,共8页
The nucleophilic hydrohalogenation of 2-alkynoic acids anti their derivatives by heating with lithium halides iu HOAc afforded the thermodynamically unfavorable 3-halo-2 (Z)- alkenoic acids and their derivatives stere... The nucleophilic hydrohalogenation of 2-alkynoic acids anti their derivatives by heating with lithium halides iu HOAc afforded the thermodynamically unfavorable 3-halo-2 (Z)- alkenoic acids and their derivatives stereospecifically 展开更多
关键词 A novel regio-and stereo-specific hydrohalogenation reaction of 2-alkynoic acids and their derivatives
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Oxygen-promoted Pd/C-catalyzed Suzuki–Miyaura reaction of potassium aryltrifluoroborates 被引量:2
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作者 Chun Liu Chao Liu +2 位作者 Xin-Min Li Zhan-Ming Gao Zi-Lin Jin 《Chinese Chemical Letters》 SCIE CAS CSCD 2016年第5期631-634,共4页
A simple and highly efficient protocol has been developed for the Pd/C-catalyzed ligand-free Suzuki- Miyaura reaction of potassium aryltrifluoroborates. In this catalytic system, the results demonstrate that oxygen pl... A simple and highly efficient protocol has been developed for the Pd/C-catalyzed ligand-free Suzuki- Miyaura reaction of potassium aryltrifluoroborates. In this catalytic system, the results demonstrate that oxygen plays a positive role in the cross-coupling reaction. In addition, this catalytic system could be successfully applied to synthesize biaryl compounds containing a carbazole moiety and the catalyst was recycled seven times without significant loss of catalytic activitv. 展开更多
关键词 Pd/C Oxygen-promoting effect Suzuki-Miyaura reaction Potassium aryltrifluoroborates Carbazole derivatives
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Design and synthesis of biotinylated dimethylation of alkannin oxime derivatives 被引量:2
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作者 Guang Huang Qing-Qing Meng +3 位作者 Wen Zhou Qi-Jing Zhang Jin-Yun Dong Shao-Shun Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2017年第2期453-457,共5页
DMAKO-05,a novel dimethylation of alkannin oxime derivative,exhibits remarkable anticancer activity as well as excellent cellular selectivity and thus has been considered as a promising antineoplastic agent for colore... DMAKO-05,a novel dimethylation of alkannin oxime derivative,exhibits remarkable anticancer activity as well as excellent cellular selectivity and thus has been considered as a promising antineoplastic agent for colorectal carcinoma and melanoma.However,its potent cytotoxicity is not closely associated with reactive oxygen species(ROS) and bioreductive alkylation.Its specific antitumor target(s) has still remained elusive.To recognize the molecular target(s) of DMAKO-05 and its analogs,four biotinylated DMAKO derivatives were designed and prepared.The biotin moiety was successfully introduced in the molecule through a modified Mitsunobu reaction,which kept its anticancer activity.Moreover,the cellbased investigation demonstrated that replacement of the linker C4 chain with another alkyl chain(C6 or C8) gave rise to the enhancement of cytotoxicity.Among these biotinyl derivatives,both compound 16 and 8c exhibited more potent anticancer activity than DMAKO-05 against MCF-7 cells and were comparatively effective to alkannin toward HCT-15 cells.As expected,they might be thought as ideal chemical probes.Collectively,our present work could provide an available approach for the identification of the potential antineoplastic target(s) of DMAKO derivatives. 展开更多
关键词 Alkannin and shikonin oxime derivatives Anticancer activity Biotin probe Molecular target Mitsunobu reaction
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Synthesis and structures of malonate derivative-calix [4] arene conjugates
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作者 Wen-Jing Hu Ming-Liang Ma +3 位作者 Yahu A.Liu Jiu-Sheng Li Biao Jiang Ke Wen 《Chinese Chemical Letters》 SCIE CAS CSCD 2015年第7期914-917,共4页
A series of malonate derivatives-calix[4]arene conjugates were synthesized through Knoevenagel condensation reaction between formyl-tetrapropoxycalix[4]arene and malonate derivatives. The structures of the resulting m... A series of malonate derivatives-calix[4]arene conjugates were synthesized through Knoevenagel condensation reaction between formyl-tetrapropoxycalix[4]arene and malonate derivatives. The structures of the resulting malonate derivative functionalized calix[4]arenes were characterized by NMR spectroscopy, mass spectrometry and even single crystal X-ray diffraction analysis. 展开更多
关键词 arene Malonate derivatives Knoevenagel condensation reaction
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New triazole derivatives containing substituted 1,2,3-triazole side chains:Design,synthesis and antifungal activity
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作者 Hai-Jiang Chen Yan-Juan Jiang +5 位作者 Yong-Qiang Zhang Qi-Wei Jing Na Liu Yan Wang Wan-Nian Zhang Chun-Quan Sheng 《Chinese Chemical Letters》 SCIE CAS CSCD 2017年第4期913-918,共6页
In order to discover new generation of triazole antifungal agents,a series of novel antifungal triazoles were designed and synthesized by structural simplification of our previously identified triazolepiperdine-hetero... In order to discover new generation of triazole antifungal agents,a series of novel antifungal triazoles were designed and synthesized by structural simplification of our previously identified triazolepiperdine-heterocycle lead compounds.Several target compounds showed good antifungal activity with a broad spectrum.In particular,compound 71 was highly active against Candida albicans and Candida glabrata.Moreover,compound 71 showed potent in vivo antifungal efficacy in the Caenorhabditis elegans-C.albicans infection model. 展开更多
关键词 Triazole derivatives Antifungal activities Click reaction Molecular docking CYP51
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