Phosphine-Catalyzed Internal Redox [4 + 2] Annulation between 1,4-Enynoates and Electron-Deficient Alkenes
作者:Dongqiu Li、Fang Cheng、Yuhai Tang、Jing Li、Yang Li、Jiao Jiao、Silong Xu
DOI:10.1021/acs.orglett.1c03206
日期:2021.12.3
enynoates are formally oxidized for the annulation while the alkynyl moiety is converted to an alkene. The reaction offers an efficient synthesis of highly functionalized cyclohexenes in moderate to good yields with exclusive regioselectivity and high diastereoselectivity under mild conditions.
在本文中,我们描述了 1,4-烯炔酸酯与缺电子烯烃的膦催化内部氧化还原 [4 + 2] 环化,其中烯炔酸酯的 γ- 和 φ-C(sp 3 )-H 被正式氧化为环化,而炔基部分转化为烯烃。该反应以中等至良好的产率有效合成高度官能化的环己烯,在温和条件下具有独特的区域选择性和高非对映选择性。