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Asymmetric Addition of Diethylzinc to Aldehydes Catalyzed by Chiral γ_Amino Alcohols

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Chinese Chemical Letters 2001年第12期12卷 1055-1056页

作者： Qian Yong XU Tong xing WU xin fu pan Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000

New chiral gamino alcohols 1-4 were synthesized and applied in the asymmetric addition of diethylzinc to aldehydes to give sec-alcohol with up to 94.0% enantiomeric excess.

关键词： Asymmetric addition gamino alcohols diethylzinc.

The Enantioselective Addition of Diethylzinc to Aldehydes Catalyzed by 2-Methylquinoline Derived Chiral Ligands

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Chinese Chemical Letters 2001年第5期12卷 395-396页

作者： Qian Yong XU Guo xing WANG xin fu pan Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000

Readily available 2-methylquinoline derived chiral ligands 1 and 2 have been applied in the enantioselective addition of diethylzinc to aldehydes with up to 91.4% ee being recorded.

关键词： Methylquinoline enantioselective addition diethylzinc.

A Novel Stereoselective Synthesis of 8-O-4' Neolignans

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Chinese Chemical Letters 2001年第2期12卷 109-110页

作者： Xiao Chuan CHEN Wen xin GU Xiao Bi JING xin fu pan Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000

1-(4-hydroxy-3-methoxyphenyl)-2-(4-formyl-2-methoxyphenoxy)-propane-1,3-diol. A 8-O-4' neolignan, has been stereoselectively synthesized in eight steps from ferulic acid, and the directly cis opening of epoxide in epo... 详细信息

关键词： 8-O-4’ Neolignans ferulic acid addition Mitsunobu reaction stereoselective synthesis

First Enantioselective Synthesis of (2R,3R)-and(2S,3S)-2-(4-hydroxyphenyl)-3-hydroxymethyl-1,4-benzodioxan-6-carbaldehyde

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Chinese Chemical Letters 2001年第3期12卷 189-192页

作者： Wen xin GU Xiao Bi JING Xiao Chuan CHEN xin fu pan Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000

A novel enantioselective synthetic approach to 1,4-benzodioxane lignans was reported in which (2R, 3R)- and (2S, 3S)-2-(4-hydroxyphenyl)-3-hydroxymethyl-1, 4-benzodioxan-6-carbaldehyde were first synthesized.

关键词： Enantioselectivity synthesis 1 4-benzodioxane lignans.

An Efficient Synthetic Method of Nordihydroguaiaretic Acid (NDGA)

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Chinese Chemical Letters 2003年第4期14卷 359-360页

作者： Ya Mu XIA Xiao Ping CAO Kun PENG xin Feng REN xin fu pan Department of Chemistry and National Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000

Nordihydroguaiaretic acid (NDGA) has been synthesized in nine steps from piperonal using Stobbe condensation as the key step with high yield. By this approach, five relative natural products were obtained.

关键词： Nordihydroguaiaretic acid piperonal Stobbe condensation.

Stereoselective Synthesis of (+)-△~5-Dehydrosugiyl Methyl Ether

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Chinese Chemical Letters 2001年第2期12卷 111-112页

作者： An Pai LI Xiao Shui PENG Yong Hong GAN xin fu pan Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000

A stereoselective synthetic route to △~5-dehydrosugiyl methyl ether was developed from (S)-(-)-α-cyclocitral, DDQ as a better oxidant for enone was used.

关键词： synthesis diterpenoids geranic (+)-△~5-dehydrosugiyl methyl ether.

Enantioselective Total Synthesis of Four Styrylpyrone Derivatives

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Chinese Chemical Letters 2002年第6期13卷 519-520页

作者： Xiao Shui PENG An Pai LI Tong xing WU xin fu pan Department of Chemistry&National Laboratory of Applied Organic Chemistry Lanzhou UniversityLanzhou 730000

The first enantioselective total synthesis of 5-acetoxygoniothalamin 1 and 5-acetoxyisogoniothalamin oxide 2 was achieved through the Sharpless kinetic resolution of racemic secondary 2- furylmethanol 5 and the Mitsunobu reaction. At the same time we developed a short synthetic route for 6R-(+)-goniothalamin 3 and (6R, 7R, 8R)-(+)-goniothalamin oxide 4. And according to this route the configuration of 5-acetoxygoniothalamin 1 was confirmed as (5S, 6S).

关键词： Enantioselective 5-acetoxygoniothalamin 5-acetoxyisogoniothalamin oxide 6R-(+)- goniothalamin (6R, 7R, 8R)-(+)-goniothalamin oxide.

First Enantioselective Synthesis of Daphneticin

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Chinese Chemical Letters 2003年第6期14卷 551-554页

作者： xin Feng REN Kun PENG Xiao Chuan CHEN xin Gang XIE Ya Mu XIA xin fu pan Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000

An enantioselective total synthesis of chiral daphneticin is reported firstly.

关键词： Synthesis enantioselective coumarinolignoids daphneticin.

The Steric Effect of trans-(1S,2S)-1-Substituted-2-(N,N-dialkyl-amino)-1-indanol Derivatives as Chiral Ligands in the Catalytic Enantioselective Addition of Diethylzinc to Aldehydes

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Chinese Chemical Letters 2002年第11期13卷 1029-1032页

作者： Qian Yong XU Hong Fang YANG xin fu pan Guang Ming ZHU Northwest Institute of Nuclear Technology P.O.Box 69Xi'an 710024 Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000 Department of Chemical Engineering Northwestern Polytechnic UniversityXi'an 710062

Optically active trans-(1S,2S)-1-substituted-2-(N,N-dialkylamino)-1-indanol derivatives have been prepared and used in the asymmetric addition of diethylzinc to aldehydes to give sec-alcohol in good yield with up to 9... 详细信息

关键词： Diethylzinc enantioselective alkylation indanol derivative.