Enantioselective total syntheses of the novel tricyclic sesquiterpene hydrocarbons (+)- and (−)-kelsoene. Absolute configuration of the natural product
作者:Goverdhan Mehta、K Srinivas
DOI:10.1016/s0040-4039(01)00288-x
日期:2001.4
lipase-catalysed kinetic resolution of endo,endo–cis-bicyclo[3.3.0]octane-2,6-diol rac-3 has provided ready access to bicyclo[3.3.0]octane-2,6-diones (−)-2 and (+)-2 of high enantiomeric purity. These C2-symmetric diones have been further elaborated to the sesquiterpene hydrocarbon (+)-kelsoene 1 and ent-kelsoene (−)-1, respectively, thereby establishing the absolute configuration of the natural product
简单而制备有效的脂肪酶催化内消旋动力学分解,内-顺式-双环[3.3.0]辛烷-2,6-二醇rac - 3提供了现成的双环[3.3.0]辛烷-2,6-二酮高对映体纯度的(-)- 2和(+)- 2。这些C 2对称的二酮已被进一步修饰为倍半萜碳氢化合物(+)-煤油1和对映体-煤油(-)- 1分别建立天然产物的绝对构型。根据这些结果,需要将先前分配给(+)-煤油的绝对构型修改为(+)- 1。