Regioselective [2+2+2] Cycloaddition Reaction Using Allene‐ynes with Simple Allenes under Nickel Catalysis
作者:Shigeru Arai、Arisa Izaki、Yuka Amako、Masaya Nakajima、Masanobu Uchiyama、Atsushi Nishida
DOI:10.1002/adsc.201900719
日期:2019.11.5
A Ni‐catalyzed [2+2+2] cycloaddition reaction between allene‐ynes and various mono‐, di‐ and tri‐substituted allenes is described. This protocol effectively differentiates allenyl π components and shows broad substrate generality to give highly functionalized carbocycles. A DFT study played a key role in revealing a detailed reaction mechanism that controls site‐, regio‐ and stereoselectivity, which
本文描述了丙二烯炔与各种单,二和三取代的丙烯之间的镍催化的[2 + 2 + 2]环加成反应。该方案可有效区分烯基π组分,并显示出广泛的底物通用性,可提供高度官能化的碳环。DFT研究在揭示控制位点,区域和立体选择性的详细反应机理中起着关键作用,这些机理被认为源于早期过渡态中对π键的取代基作用。