检索结果-南通市图书馆

Chinese Journal of Chemistry 2003年第7期21卷 950-954页

作者： GE Jian-Feng SHEN Zong-Xuan ZHANG Ya-Wen LU Xin-Hua LU Zhong-E Dapartment of Chemistry and Chemical Engineering Suzhou UniversitySuzhouJiangsu 215006China Department of Material and EngineeringSuzhou UniversitySuzhouJiangsu 215006China Department of Chemistry and Chemical Engineering Suzhou UniversitySuzhouJiangsu 215006China

Three 2-{(3R,7aS)-1,1-disubstituted-tetrahydro-1H-pyrrolo[1,2-c][1,3]oxazol-3-yl}phenols have been synthesized from salicylaldehyde and amino alcohols derived from L-proline,and used as ligands hi enantioselective add... 详细信息

关键词： aminophenol 2-{(3R 7aS)-1,1-disubstituted-tetrahydro-1H-pyrrolo[1,2-c]oxazol-3-yl}-phenols enantio-selective addition diethylzinc

The first catalytic asymmetric addition of diethylzinc to aldehyde promoted by chiral thiourea

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2011年第11期22卷 1265-1268页

作者： Zhi Guo Qiao Tian Hua Shen Zhen Fang Fu Jun Qi Li Hong Wang Qing Bao Song The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology College of Chemical Engineering and Materials Science Zhejiang University of Technology Hangzhou 310032 China

A series of C_2-symmetric and asymmetric chiral thiourea derivatives were synthesized from commercial *** of the new compounds have been fully characterized by IR,~1H NMR,^（13）C NMR,MS spectra and elemental *** chiral thioureas were used as chiral ligands in the catalytic enantioselective ethylation of aldehydes with diethylzinc,the corresponding sec-alcohols were gained with excellent enantioselectivities（up to 87.1%ee） and high yields（up to 76.7%） after the conditions were optimized.

关键词： Chiral thiourea diethylzinc Amino alcohol C_2-symmetric Enantioselective addition

Synthesis of Novel 1,4-Bissulfonamide Ligands for Enantioselective Addition of diethylzinc to Aldehydes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2011年第8期29卷 1697-1702页

作者：杨明华孙江涛朱成建 Department of Chemistry Lishui University Lishui Zhejiang 323000 China School of Chemistry and Chemical Engineering State Key Laboratory of Coordination Chemistry Nanjing University Nanjing Jiangsu 210093 China

Several novel chiral sulfonamide ligands based on （1R,2S,4R,5S）-1,4-diamino-2,5-dimethylcyclohexane skele- ton have been synthesized and their application in the enantioselective addition of diethylzinc to aldehydes was in- vestigated in the presence of Ti（Oipr）4. The effect of ligands, temperature and the loading amount of ligands was studied. Under optimized conditions, enantioselective addition of diethylzinc with various aryl aldehydes and aliphatic aldehydes proceeded smoothly and afforded chiral secondary alcohols in up to 88% ee.

关键词： asymmetric catalysis chiral sulfonamide diethylzinc aldehyde

Axially Dissymmetric Chiral (R)-N,N′-Bis(2-hydroxy-3,5-di-tert-butyl-arylmethyl)-1,1′-binaphthalene-2,2′-diamine as Chiral Ligands in the Reaction of diethylzinc to Aldehydes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2002年第11期20卷 1319-1325,1130页

作者：施敏段伟良荣国斌 State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China East China University of Science and Technology Shanghai 200237 China

Chiral ligand (R)-N, N'-Bis(2-hydroxy-3,5-di- tert-butyl-aryl-methyl)-1, 1'-binaphthalene-2,2'-diamine derived from the reduction of Schiff base (R)-2,2'-bis (3,5-di-tert-butyl-2-hy-droxybenzylideneamino)-1, 1'-binaphthyl with LiAIH(4) is fairly effective in the asymmetric addition reaction of diethylzinc to aldehydes by which good yields (46%-94%) of the corresponding sec-alcohols can be obtained in moderate ee (51%-79%) with R configuration for a variety of aldehydes.

关键词： axially dissymmetric chiral ligand (R)-N,N '-bis(2-hydroxy-3,5-di-tert-butyl-arylmethyl)-1,1 '-binaphthalene-2,2 '-diamine diethylzinc asymmetric addition reaction

Synthesis of Chiral N-Ferrocenylmethylaminoalcohols and their Application in Enantioselective Addition of diethylzinc to Aldehydes

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2004年第9期15卷 1025-1028页

作者： JianFengGE ZongXuanSHEN YaWenZHANG DepartmentofChemistryandChemicalEngineering SuzhouUniversitySuzhou215006 DepartmentofMaterialandEngineeringSuzhouUniversity Suzhou215006

Three chiral N-ferrocenylmethylaminoalcohols were synthesized from readily available natural L-valine, leucine and phenylanine, and used as chiral ligands in the enantioselective addition of diethylzinc to aldehydes.

关键词： N-Ferrocenylmethylaminoalcohol asymmetric synthesis enantioselective addition diethylzinc

Fructose derived pyridyl alcohol ligands: synthesis and application in the asymmetric diethylzinc addition to aldehydes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2000年第1期18卷 121-123页

作者：周永贵戴立信侯雪龙 Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

Easily available chiral ketones were employed for the synthesis of optically active pyridyl alcohols, which were applied in the asymmetric diethylzinc addition to aldehydes, up to 89.4% e.e. was obtained using D-fruct... 详细信息

关键词： Pyridyl alcohols diethylzinc asymmetric addition

Optically Active Helical Poly[(S)-3-vinyl-2,2'-dihydroxy-1,1'-binaphthyl]:New Ligand for Asymmetric Addition of diethylzinc to Aryl Aldehyde

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2015年第4期33卷 463-466页

作者： Yehui Chen Guochang Qin Liwen Yang Nianfa Yang Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education College of ChemistryXiangtan UniversityXiangtanHunan 411105China

Poly[(S)-3-vinyl-2,2'-dihydroxy-1,1'-binaphthyl](L*)was obtained by taking off the protecting groups of poly[(S)-3-vinyl-2,2'-bis(methoxymethoxy)-1,1'-binaphthyl](poly-1).L*was proved to keep a stable helical con-formation in *** application of helical L*in the asymmetric addition of diethylzinc to aldehydes has been *** catalytic system employing 10 mol%of L*and 150 mol%of Ti(OiPr)_(4) was found to promote the addi-tion of diethylzinc to a wide range of aromatic aldehydes,giving up to 99%enantiomeric excess(ee)and up to 93%yield of the corresponding secondary alcohol at 0℃.The chiral polymer can be easily recovered and reused with-out loss of catalytic activity as well as enantioselectivity.

关键词： helical polyolefin binaphthyl asymmetric addition diethylzinc aryl aldehyde

Chiral Ligands from Abrine.4. Heterocycle-Containing 1,2,3,4-Tetrahydro-β-Carboline Methyl Ester Used for Catalysis of Enantioselective Addition of diethylzinc to Benzaldehyde

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1998年第6期9卷 527-528页

作者： Bi Tao ZHAO Hua Jie ZHU Xing HONG Jun ZHOU Xiao Jiang HAO(KunAnng Institute of Botany, Chinese Academy of Sciences, Heilongtan, Kunming 650204) Kunming Institute of Botany Chinese Academy of Sciences Heilongtan Kunming 650204 China

Four 1, 2,3,4-tetrahydro - β - c arboline amino acid esters with a heterocycle at the C- 1position were used as chiral ligands in the enantioselective addition reactions. The differentpositions of the heteroatoms gav... 详细信息

关键词： Enantioselective addition diethylzinc 1,2,3,4-tetrahydro-β-carboline ester

Synthesis of new chiral 1,2,3,4-tertrahydroisoquinoline β-amino alcohol for asymmetric diethylzinc addition to aryl aldehydes(Ⅰ)

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第12期20卷 1393-1396页

作者： Geng Xu Zhan Zhu Liu Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (Peking Union Medical College) Ministry of Education Institute of Materia Medica Peking Union Medical College & Chinese Academy of Medical Sciences Beijing 100050 China

Four new chiral 1,2,3,4-tetrahydroisoquinoline-derived G-amino alcohols were synthesized from commercially available LDOPA. These ligands were evaluated in the asymmetric addition of diethylzinc to benzaldehydes and showed different catalytic activities （up to 86% ee）. The solvent played an important role in the enantioselective process. The transition state models were proposed to explain the reversion of the product configuration.

关键词： β-Amino alcohol Tetrahydroisoquinoline diethylzinc Asymmetric addition

A Novel Bimetallic Tetrahedron Cobalt Complex Promoting the Addition of diethylzinc to Benzaldehyde

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2001年第5期12卷 461-464页

作者： Wei Qiang ZHANG Zhi CHEN Yu Hua ZHANG Xin Yi ZHU Yu Gang CHEN Huan Wang JING Yuan Qi YIN State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000

Our recent work found a novel bimetallic tetrahedron cobalt complex which can catalyze the addition of diethylzinc to benzaldehyde effectively.

关键词： Catalyzed addition cobalt complex diethylzinc benzaldehyde