Efficient Asymmetric Synthesis of <i>abeo-</i>Abietane-Type Diterpenoids by Using the Intramolecular Heck Reaction
作者:Manabu Node、Minoru Ozeki、Loïc Planas、Masashi Nakano、Hirofumi Takita、Daisuke Mori、Shinji Tamatani、Tetsuya Kajimoto
DOI:10.1021/jo901972b
日期:2010.1.1
The synthesis of the abeo-abietane-type diterpenoids, i.e., (−)-dichroanal B, (−)-dichroanone, and taiwaniaquinone H, was achieved by using the intramolecular asymmetric Heck reaction. Our synthetic routes required fewer steps and gave a much higher overall yield and ee within shorter steps than those for racemic and antipodal forms reported to date (10, 12, and 13 steps with an overall yield of 50%
通过使用分子内不对称Heck反应,合成了abeo -abietane型二萜类化合物,即(-)-二氯乙醛B,(-)-二氯丁酮和taiwaniaquinoneH。与迄今报道的消旋和对映体形式相比,我们的合成路线所需的步骤更少,并且在较短的步骤中提供了更高的总收率和ee(10、12和13个步骤,总收率分别为50%,40%和39% ,分别为94%,98%和98%ee)。