Enzyme-Catalyzed Nucleophilic Ring Opening of Epoxides for the Preparation of Enantiopure Tertiary Alcohols
作者:Maja Majerić Elenkov、H. Wolfgang Hoeffken、Lixia Tang、Bernhard Hauer、Dick B. Janssen
DOI:10.1002/adsc.200700146
日期:2007.10.8
dehalogenase from Agrobacterium radiobacter AD1 (HheC) catalyzes nucleophilic ring opening of epoxides with cyanide and azide. In the case of 2,2-disubstituted epoxides, this reaction proceeds with excellent enantioselectivity (E values up to>200), which gives, by kinetic resolution, access to various enantiopure epoxides and β-substituted tertiary alcohols (ee up to 99 %). Since the enzyme has a broad
根癌土壤杆菌AD1(HheC)的卤代醇脱卤酶催化氰化物和叠氮化物对环氧化物的亲核开环。在2,2-二取代的环氧化物的情况下,该反应以优异的对映选择性(E值最高> 200)进行,通过动力学拆分,可以得到各种对映纯的环氧化物和β-取代的叔醇(ee高达99% )。由于该酶具有广泛的底物范围,并且由于这些叔醇难以用其他方式制备,因此HheC是生产β-氰基和β-叠氮基叔醇的有吸引力的生物催化剂。