作者:Gábor Tasnádi、Enikő Forró、Ferenc Fülöp
DOI:10.1039/b920731g
日期:——
hydrolyses of β-amino esters with H2O (0.5 equiv.) in t-BuOMe or in i-Pr2O at 45 °C are described. The enantiomers of biologically relevant β-arylalkyl-substituted β-amino acids, and especially (R)-3-amino-3-(2,4,5-trifluorophenyl)butanoic acid, the intermediate of the new antidiabetic drug sitagliptine, were prepared with high enantiomeric excesses (ee≥96%) and in good yields (≥42%).
对映选择性(ë〜200)洋葱伯克霍尔德氏菌-催化的β氨基酯的水解与高氧2描述了在45°C下t -BuOMe或i - Pr 2 O中的(0.5当量)。生物相关的β-芳基烷基取代的β-氨基酸的对映体,尤其是(R)-3-氨基-3-(2,4,5-三氟苯基)丁酸中,中间的新的抗糖尿病药的西格列汀,用高对映体过量(制备EE ≥96%)和良好的产率(≥42%)。