Total Synthesis of Synechoxanthin through Iterative Cross-Coupling
作者:Seiko Fujii、Stephanie Y. Chang、Martin D. Burke
DOI:10.1002/anie.201102688
日期:2011.8.16
The choice is yours: The first totalsynthesis of the antioxidant carotenoid synechoxanthin was achieved through a novel iterative cross‐coupling approach in which the polarity of the bifunctional building blocks is reversed to match the preferred polarity for CC bond formation (see scheme). The convergent, stereocontrolled, and flexible nature of this synthesis enables systematic studies of the biological
选择权在您手中:抗氧化剂类胡萝卜素聚虫黄质的首次全合成是通过一种新颖的迭代交叉偶联方法实现的,其中双功能构建块的极性反转以匹配 C C 键形成的首选极性(参见方案) . 这种合成的收敛、立体控制和灵活的性质使系统研究这种天然产物的生物活性成为可能。
Combined Lewis Acid Catalyzed Diastereoselective Halogenative Cascade Annulation of Enone-Tethered Cyclohexadienones
The cascade difunctionalization of α,β-unsaturated carbonyls by nucleophilic halogenation followed by enolate trapping with other electrophiles is highly challenging in synthetic organic chemistry. Herein, we report a chemo- and diastereoselective cascade annulation of enone-tethered cyclohexadienones by using an unconventional combined Lewisacidcatalyzed halogenation reaction in the presence of