With large quantities of the vinyl aldehyde (+)- 18 in hand, the stage was now set for the tandem introduction of the remaining two stereocenters [C(3) and C(12)] employing the Koga r eaction.

• 大量的乙烯醛(+)-18手舞台正推出一套为串联其余两个立体[三(3)、三(12)]聘用四郎住宅丙烷.