GENERATION OF αTRIFLUOROMETHYLATED ENOLATE SPECIES AND THEIR APPLICATION TO ASYMMETRIC ALDOL SYNTHESIS
GENERATION OF αTRIFLUOROMETHYLATED ENOLATE SPECIES AND THEIR APPLICATION TO ASYMMETRIC ALDOL SYNTHESIS
批准号:
14550808
负责人:
ISHIHARA Takashi
金额:
$2.18万
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (C)
财政年份:
2002
资助国家:
日本
项目状态:
已结题
起止时间:
2002 至 2003
中文摘要
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英文摘要
When N-methoxy-N-methyl-2-bromo-2, 3, 3, 3-tetrafluropropanamide was allowed to react with various aldehydes under the influence of triphenylphosphine and a catalytic amount of titanium (IV) isopropoxide in dichloromethane at room temperature, (trifluoromethyl)-β-hydroxy amides preferentially in good to excellent yields.In addition, the reactions of benzyl 2-bromo-2, 3, 3, 3-tetrafluoropro-panoate with various types of chiral imines, such as (S)-sulfinimines and imines derived from (S)-valine methyl ester or (S)-phenylglycine methyl ester, in the presence of zinc in tetrahydrofuran at room temperature were revealed to afford the threo-and erythro-isomers of α-fluoro-α-(trifluoromethyl) -β-amino esters with high diasteremeric excesses in fair to good chemical yields.
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T.Sekiguchi, K.Sato, T.Ishihara, T.Konno, H.Yamanaka: "Zinc-mediated Coupling Reaction of 2-Bromo-2,3,3,3-tetrafluoropropanoate with Various Chiral Imines. Simple and Effective Access to Optically Active α-Fluoro-α-(trifluoromethyl)-β-amino Esters"Chemist
T.Sekiguchi、K.Sato、T.Ishihara、T.Konno、H.Yamanaka:“锌介导的 2-溴-2,3,3,3-四氟丙酸酯与各种手性亚胺的偶联反应。简单有效地获得光学活性α-氟-α-(三氟甲基)-β-氨基酯”化学家
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K.Sato, T.Sekiguchi, T.Ishihara, T.Konno, H.Yamanaka: "Highly stereoselective aldol-type reaction of 2-bromo-2,3,3,3-tetrafluoropropanamide with aldehydes leading to erythro-α-fluoro-α-(trifluoromethyl)-β-hydroxy amides"Chemistry Letters. Vol.33,No.2. 154
K.Sato、T.Sekiguchi、T.Ishihara、T.Konno、H.Yamanaka:“2-溴-2,3,3,3-四氟丙酰胺与醛的高度立体选择性羟醛型反应,生成赤式-α-氟-α-(三氟甲基)-β-羟基酰胺”《化学快报》第 33 卷第 2 期第 154 期
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T.Sekiguchi, K.Sato, T.Ishihara, T.Konno, H.Yamanaka: "Zinc-mediated Coupling Reaction of 2-Bromo-2, 3, 3, 3-tetrafluoropropanoate Access to Optically Active α-Fluoro-α-(trifluoromethyl) -β-amino Esters"Chemistry Letters. 33 (No.6) (in press). (2004)
T.Sekiguchi、K.Sato、T.Ishihara、T.Konno、H.Yamanaka:“锌介导的 2-溴-2,3,3,3-四氟丙酸酯的偶联反应获得光学活性 α-氟-α- (三氟甲基)-β-氨基酯”Chemistry Letters. 33 (No.6) (印刷中). (2004)
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K.Sato, T.Sekiguchi, T.Ishihara, T.Konno, H.Yamanaka: "Highly Stereoselective Aldol-type Reaction of 2-Bromo-2,3,3,3-tetrafluoropropan-amide with Aldehydes Leading to erythro-α-Fluoro-α-(trifluoromethyl)-β-hydroxy Amides"Chemistry Letters. Vol.33, No.2. 1
K.Sato、T.Sekiguchi、T.Ishihara、T.Konno、H.Yamanaka:“2-溴-2,3,3,3-四氟丙烷酰胺与醛的高度立体选择性羟醛型反应导致赤式-α -氟-α-(三氟甲基)-β-羟基酰胺”Chemistry Letters. Vol.33, No.2. 1
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通讯作者:
K.Sato, T.Sekiguchi, T.Ishihara, T.Konno, H.Yamanaka: "Highly Stereoselective Aldol-type Reaction of 2-Bromo-2, 3, 3, 3-tetrafluoropropanamide with Aldehydes Leading to erythro-α-Fluoro-α-(trifluoromethyl) -β-hydroxy Amides"Chemistry Letters. 33 (No.2). 1
K.Sato、T.Sekiguchi、T.Ishihara、T.Konno、H.Yamanaka:“2-溴-2,3,3,3-四氟丙酰胺与醛的高度立体选择性羟醛型反应生成赤式-α-氟-α-(三氟甲基)-β-羟基酰胺”《化学快报》. 33 (No.2). 1
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Computational Science for understanding the vortical structure and vortex dynamics in high Reynolds-number turbulence
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批准号:23560194
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项目类别:Grant-in-Aid for Scientific Research (C)
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资助金额:$3.33万
-
财政年份:2011
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负责人:ISHIHARA Takashi
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依托单位:
Development of the methods of large-scale, high-resolution direct numerical simulation of canonical problems of inhomogeneous turbulence
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批准号:19560064
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项目类别:Grant-in-Aid for Scientific Research (C)
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资助金额:$2.91万
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财政年份:2007
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负责人:ISHIHARA Takashi
-
依托单位:
Development of a platform for analyses of ultra-scale direct numerical simulation data of turbulence
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批准号:15607011
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项目类别:Grant-in-Aid for Scientific Research (C)
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资助金额:$2.3万
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财政年份:2003
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负责人:ISHIHARA Takashi
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依托单位:
Development of new process for the highly stereoselective synthesis of α-fluoro-β-hydroxy esters
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批准号:11650893
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项目类别:Grant-in-Aid for Scientific Research (C)
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资助金额:$1.86万
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财政年份:1999
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负责人:ISHIHARA Takashi
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依托单位: