STEREOSELECTIVITY

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  • 期刊=Chemical Research in Chinese Universitiesx
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Promotion Mechanism of H2O for Stereoselectivity in Pd(Ⅱ)-catalyzed C—H Aryiation of Diarylphosphinamides with Arylboronic Acids
《Chemical Research in Chinese Universities》2020年第5期843-846,共4页CAI Yanchun JIAO Long QIU Xuepcng DU Zhijun 
Supported by the National Natural Science Foundation of China(No.21772190).
On the basis of a series of control experiments and nuclear magnetic resonance analyses,it is discovered that Boc-protected amino acid ligand coordinated to Pd center is partly replaced by N,N-dimethylformamide,and H2...
关键词：C-H activation STEREOSELECTIVITY WATER Ligand exchange 
Stereoselective Synthesis of Sulfonyl-substituted trans-2,3-Dihydrofuran Derivatives via Reaction of Arsonium Ylides with α,β-Unsaturated Ketones
《Chemical Research in Chinese Universities》2014年第4期596-600,共5页CAO Long ZHOU Xiaohong CHEN Jie ZHANG Hui DENG Hongmei SHAO Min McMILLS Mark C. CAO Weiguo 
Supported by the National Natural Science Foundation of China（No.21272152）.
Trans-2,3-dihydrofuran derivatives 3 or 4 substituted with a sulfonyl group were prepared with high chemoselectivity and good yields by [1＋4]-addition reaction of α,β-unsaturated ketones 1 with arsonium bromide 2 i...
关键词：STEREOSELECTIVITY DIHYDROFURAN Arsonium Ylide 
Highly Stereoselective Synthesis of trans-3-Chloro-β-lactams from Imines and Mixed Chloroacetyl and Nitroacetyl Chlorides
《Chemical Research in Chinese Universities》2011年第6期958-962,共5页QI Heng-zhen MO Shan-yan XU Jia-xi 
Supported by the National Natural Science Foundation of China(Nos.20772005,20972013);the Beijing Natural Science Foundation,China(No.2092022);the Specialized Research Fund for the Doctoral Program of Higher Education,Ministry of Education of China
A series of trans-3-chloro-β-lactams was synthesized stereospecifically from imines and chloroacetyl chloride or a mixture of chloroacetyl chloride and nitroacetyl chloride, prepared from vinylidene chloride and a mi...
关键词：Β-LACTAM Chloroacetyl chloride Staudinger reaction STEREOSELECTIVITY 
Stereoselectivities in α- and β-Amino Acids Catalyzed Mannich Reactions Involving Cyclohexanone
《Chemical Research in Chinese Universities》2011年第4期673-677,共5页WANG Ying FU Ai-ping LI Hong-liang TIAN Feng-hui YUAN Shu-ping SI Hong-zong DUAN Yun-bo WANG Zong-hua 
Supported by the National Natural Science Foundation of China(Nos.20773071,20901043);the Natural Science Foundation of Shandong Province,China(No.ZR2010BM024);the Project of Shandong Province Higher Educational Science and Technology Program,China(No.J10LB06)
The effects of two different amino acid catalysts on the stereoselectivities in the direct Mannich reactions of cyclohexanone,p-anisidine and p-nitrobenzaldehyde were studied with the aid of density functional theory....
关键词：Syn-and anti-Mannich reaction STEREOSELECTIVITY Amino acid Transition state 
Catalytic Characteristics of Lipase Immobilized in CTAB/TX-100 MBG
《Chemical Research in Chinese Universities》2010年第1期110-113,共4页SONG Shao-fang LUAN Yu-xia 
Supported by the National Natural Science Foundation of China(No. 20803044);the Foundation of Key Laboratory of Colloid and Interface Chemistry of Ministry of Education,Shandong University,China(No.200714)
CTAB/TX-100 microemtdsion-based gel（MBG）, which could be soaked in aqueous solution for a long time without mechanical strength and shape changes, was successfully prepared. Lipase immobilized in this gel had a high...
关键词：Microemulsion-based gel（MBG） Immobilized lipase Activity STEREOSELECTIVITY ESTERIFICATION Hydrolysis 
The Cycloaddition Reactions Catalyzed by Some Rare Earth Chlorides
《Chemical Research in Chinese Universities》1999年第4期381-384,共4页SHI Lei SUN Ren-an YANG Ren-wu YU Shu-wen LIAO Shi-jian YU Dao-rong 
关键词：Cycloaddition reaction Rare earth chloride Catalytic activity STEREOSELECTIVITY 
Studies on Different Cycloaddition Reactions Catalyzed by ZnCl_2
《Chemical Research in Chinese Universities》1998年第4期90-93,共4页SHI Lei , SUN Ren an and YANG Ren wu (Department of Chemistry, Liaoning Normal University, Dalian, 116029) YU Shu wen, LIAO Shi jian and YU Dao rong (Dilian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023) 
ＩｎｔｒｏｄｕｃｔｉｏｎＣｙｃｌｏａｄｄｉｔｉｏｎｒｅａｃｔｉｏｎｓｈａｖｅｂｅｅｎｅｘｔｅｎｓｉｖｅｌｙｕｓｅｄｉｎｏｒｇａｎｉｃｓｙｎｔｈｅｓｅｓ，ｅｓｐｅｃｉａｌｙｉｎｔｈｅｓｙｎｔｈｅｓｅｓｏｆｍｅｄｉｃｉｎ...
关键词：ZnCl  2 catalyst Cycloaddition reaction ACTIVITY STEREOSELECTIVITY 
Studies on Glycosides(Ⅺ)──A Convenient Stereoselective Synthesis of 1-O-Aryl-α-D-glucopyranosides from Glucosyl Trimethylsilyl Ether
《Chemical Research in Chinese Universities》1995年第4期370-372,共3页LI Zhong-jun QIU Dong-Xu WANG Yan-feng and CAI Meng-Shen(School of Pharmaceutical Sciences,Beijing Medical University,Beijing,100083) 
ＳｔｕｄｉｅｓｏｎＧｌｙｃｏｓｉｄｅｓ（Ⅺ）──ＡＣｏｎｖｅｎｉｅｎｔＳｔｅｒｅｏｓｅｌｅｃｔｉｖｅＳｙｎｔｈｅｓｉｓｏｆ１－Ｏ－Ａｒｙｌ－ａ－Ｄ－ｇｌｕｃｏｐｙｒａｎｏｓｉｄｅｓｆｒｏｍＣｌｕｃｏｓｙｌＴｒｉｍｅｔ...
关键词：Glucosyl trimethylsilyl ether Glycosylation STEREOSELECTIVITY 
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