The first total synthesis of (±)-annosqualine by means of oxidative enamide–phenol coupling: pronounced effect of phenoxide formation on the phenol oxidation mechanism
作者:Hiroki Shigehisa、Jun Takayama、Toshio Honda
DOI:10.1016/j.tetlet.2006.08.028
日期:2006.10
The first total synthesis of a spiro-isoquinoline alkaloid, (±)-annosqualine, was established by employing an enamide–phenol coupling of a 1-methylene-1,2,3,4-tetrahydroisoquinoline derivative with a hypervalent iodine reagent, where the formation of the phenoxide was recognized to be an essential step for the reaction of the phenolic hydroxyl group with the hypervalent iodine reagent leading to the
螺-异喹啉生物碱(±)-氨基喹啉的第一个全合成是通过将1-亚甲基-1,2,3,4-四氢异喹啉衍生物与高价碘试剂进行酰胺-苯酚偶联而建立的,其中酚盐的形成被认为是酚羟基与高价碘试剂反应从而形成所需产物的重要步骤。