Efficient Enzymatic Routes for the Synthesis of New Eight-membered Cyclic β-Amino Acid and β-Lactam Enantiomers
作者:Enikő Forró、Loránd Kiss、Judit Árva、Ferenc Fülöp
DOI:10.3390/molecules22122211
日期:——
Efficient enzymatic resolutions are reported for the preparation of new eight-membered ring-fused enantiomeric β-amino acids [(1R,2S)-9 and (1S,2R)-9] and β-lactams [(1S,8R)-3, (1R,8S)-3 (1S,8R)-4 and (1R,8S)-7], through asymmetric acylation of (±)-4 (E > 100) or enantioselective hydrolysis (E > 200) of the corresponding inactivated (±)-3 or activated (±)-4 β-lactams, catalyzed by PSIM or CAL-B in
报告了有效的酶解方法,用于制备新的八元环稠合对映体β-氨基酸[(1R,2S)-9和(1S,2R)-9]和β-内酰胺[(1S,8R)-3 ,(1R,8S)-3(1S,8R)-4和(1R,8S)-7]通过相应的(±)-4(E> 100)不对称酰化或相应的对映选择性水解(E> 200) PSIM或CAL-B在有机溶剂中催化的灭活(±)-3或活化(±)-4β-内酰胺。CAL-B催化的(±)-6(E> 200)环裂解导致未反应的(1S,8R)-6,这是合成对映体抗毒素a的潜在中间体。着眼于E,反应速率和产物收率的最佳策略,强调了底物工程的重要性。