A New Route to Enantiopure β-Aryl-Substituted β-Amino Acids and 4-Aryl-Substituted β-Lactams through Lipase-Catalyzed Enantioselective Ring Cleavage of β-Lactams
作者:Enikő Forró、Tihamér Paál、Gábor Tasnádi、Ferenc Fülöp
DOI:10.1002/adsc.200505434
日期:2006.5
enantiomers through the CAL-B (lipase B from Candida antarctica)-catalyzed enantioselective (E>200) ring cleavage of the corresponding racemic β-lactams with 1 equiv. of H2O in i-Pr2O at 60 °C. The product (R)-β-amino acids (ee≥98%, yields≥42%) and unreacted (S)-β-lactams (ee≥95%, yields≥41%) could be easily separated. The ring opening of enantiomeric β-lactams with 18% HCl afforded the corresponding
开发了一种简单有效的直接酶法,用于通过CAL-B(南极假丝酵母的脂肪酶B )催化的对映选择性(E > 200)环合成4-芳基取代的β-内酰胺和相应的β-氨基酸对映体1当量裂解相应的外消旋β-内酰胺。60°C下i- Pr 2 O中的H 2 O含量。可以容易地分离出产物(R)-β-氨基酸(ee≥98%,产率≥42%)和未反应的(S)-β-内酰胺(ee≥95%,产率≥41%)。对映体β-内酰胺与18%HCl的开环得到相应的对映体纯β-氨基酸盐酸盐(ee≥99%)。