Total syntheses of (+)-ipomeamarone and (−)-ngaione via novel intramolecular hydrogen abstraction
作者:Takashi Sugimura、Akira Tai、Kiyoto Koguro
DOI:10.1016/s0040-4020(01)85659-3
日期:1994.1
The first total syntheses of enantiomerically pure (+)- ipomeamarone and its enantiomer (−)-ngaione were achieved. From optically pure sec,sec-1,3-diol 6 obtained through enantio differentiating hydrogenation, 11a consisting of sec,tert-1,3-diol was prepared using a novel stereocontrolled hydrogen abstraction/olefin addition process. Regiocontrolled syn and anti hydride additions to optically active
实现了对映体纯的(+)-ipomeamarone及其对映体(-)-ngaione的首次全部合成。从通过对映异构体氢化获得的光学纯的仲,仲-1,3-二醇6,使用新颖的立体控制的氢提取/烯烃加成方法制备了由仲,叔-1,3-二醇组成的11a。在光学活性双环缩醛5中进行区域控制的顺式和反氢化物加成,生成了(+)-ipomeamarone和(-)-ngaione的前体。