Enantioselective synthesis of N-Boc-1-naphthylglycine
摘要:
A new stereoselective synthesis of enantiomerically pure 1-naphthylglycine has been developed. The source of chirality is the catalytic Sharpless epoxidation. Regioselective and stereospecific ring-opening of the corresponding epoxy alcohol is performed either with sodium azide or with benzhydrylamine as ammonia synthetic equivalents. Subsequent hydrogenation in the presence of (Boc)(2)O affords crystalline N-Boc-3-(1-naphthyl)propane-1,2-diol which is enantiomerically enriched up to 100% ee and oxidized to the alpha-amino acid. (C) 1997 Elsevier Science Ltd.
A practical procedure for catalytic asymmetric synthesis of opticallyactive arylglycine derivatives viaopticallyactive α-aminonitriles has been developed. The N-benzhydryl α-arylaminonitrile intermediates were prepared in excellent yield (89–99%) and enantiomeric purity (96 to >98% ee) by enantioselective cyanation of aldimines with TMSCN/iPrOH in the presence of 2.5 mol % of an easily prepared
[EN] 3-AMINO-2-HRYDROXYALKANOIC ACIDS AND THEIR PRODRUGS<br/>[FR] ACIDES 3-AMINO-2-HRYDROXYALKANOIQUES ET LEURS PROMEDICAMENTS
申请人:ABBOTT LAB
公开号:WO2004013085A1
公开(公告)日:2004-02-12
Compounds having the formula are useful for treating conditions which arise from or are exacerbated by angiogenesis. Also disclosed are pharmaceutical compositions comprising the compounds, methods of treatment using the compounds, methods of inhibiting angiogenesis, and methods of treating cancer.
3-Amino-2-hydroxyalkanoic acids and their prodrugs
申请人:——
公开号:US20040122098A1
公开(公告)日:2004-06-24
Compounds having the formula
1
are useful for treating conditions which arise from or are exacerbated by angiogenesis. Also disclosed are pharmaceutical compositions comprising the compounds, methods of treatment using the compounds, methods of inhibiting angiogenesis, and methods of treating cancer.
Enantioselective synthesis of N-Boc-1-naphthylglycine
作者:Eva Medina、Anton Vidal-Ferran、Albert Moyano、Miquel A. Pericàs、Antoni Riera
DOI:10.1016/s0957-4166(97)00137-7
日期:1997.5
A new stereoselective synthesis of enantiomerically pure 1-naphthylglycine has been developed. The source of chirality is the catalytic Sharpless epoxidation. Regioselective and stereospecific ring-opening of the corresponding epoxy alcohol is performed either with sodium azide or with benzhydrylamine as ammonia synthetic equivalents. Subsequent hydrogenation in the presence of (Boc)(2)O affords crystalline N-Boc-3-(1-naphthyl)propane-1,2-diol which is enantiomerically enriched up to 100% ee and oxidized to the alpha-amino acid. (C) 1997 Elsevier Science Ltd.