Effective Asymmetric Synthesis of 1,2,9,9a-Tetrahydrocyclopropa[<i>c</i>]benzo[<i>e</i>]indol-4-one (CBI)
作者:David B. Kastrinsky、Dale L. Boger
DOI:10.1021/jo035465x
日期:2004.4.1
A short, asymmetric synthesis of the 1,2,9,9a-tetrahydrocyclopropa[c]benzo[e]indol-4-one (CBI) analogue of the CC-1065 and duocarmycin alkylation subunits is detailed that employs an effective enzymatic desymmetrization reaction of prochiral diol 12 using a commercially available Pseudomonas sp. lipase. The optically active monoacetate (S)-13 is furnished in exceptional conversions (88%) and optical
详细介绍了CC-1065和Duocarmycin烷基化亚基的1,2,9,9a-四氢环丙烷[ c ]苯并[ e ]吲哚-4-酮(CBI)类似物的短时不对称合成,该合成方法采用了有效的酶促脱对称反应。使用市售的Pseudomonas sp。制备前手性二醇12。脂肪酶。旋光性单乙酸酯(S)-13具有出色的转化率(88%)和旋光纯度(99%ee),可作为制备CBI任一对映异构体的中间体。同样,假单胞菌sp。脂肪酶解决了外消旋中间体19,以良好的转化率和光学纯度(99%ee)提供先进的CBI中间体,并提供了制备光学活性CBI衍生物的替代方法。