Catalytic Enantioselective Cyclopropanation of α-Fluoroacrylates: An Experimental and Theoretical Study
作者:Amandine Pons、Vincent Tognetti、Laurent Joubert、Thomas Poisson、Xavier Pannecoucke、André B. Charette、Philippe Jubault
DOI:10.1021/acscatal.9b00354
日期:2019.3.1
Herein, we report the catalytic asymmetric synthesis of functionalized fluorocyclopropanes from α-fluoroacrylates. The method using Rh2((S)-TCPTTL)4 allowed the difficult reaction of an in situ-generated electrophilic Rh-carbene with an electron-poor α-fluoroacrylate. The desired fluorocyclopropanes were obtained in good yields, excellent dr and ee. Finally, the mechanism of this transformation was
在此,我们报道了由α-氟代丙烯酸酯催化不对称合成功能化氟代环丙烷。使用Rh 2((S)-TCPTTL)4的方法使原位生成的亲电子Rh卡宾与贫电子的α-氟代丙烯酸酯难以反应。以良好的产率,优异的dr和ee获得所需的氟代环丙烷。最后,通过密度泛函理论(DFT)计算研究了这种转变的机理,以解释供体-受体重氮化合物与缺电子的α-氟代丙烯酸酯的特殊反应性。