Electro‐Mechanochemical Atom Transfer Radical Cyclizations using Piezoelectric BaTiO
<sub>3</sub>
作者:Christian Schumacher、José G. Hernández、Carsten Bolm
DOI:10.1002/anie.202003565
日期:2020.9.14
formation and regeneration of active CuI species is a fundamental mechanistic step in copper‐catalyzed atomtransferradicalcyclizations (ATRC). Typically, the presence of the catalytically active CuI species in the reaction mixture is secured by using high CuI catalyst loadings or the addition of complementary reducing agents. In this study it is demonstrated how the piezoelectric properties of barium
活性Cu I物种的形成和再生是铜催化原子转移自由基环化(ATRC)的基本机理步骤。通常,通过使用高Cu I催化剂负载量或添加还原性还原剂来确保反应混合物中催化活性Cu I物质的存在。在这项研究中,证明了如何通过机械球磨法利用钛酸钡(BaTiO 3)的压电特性在应变压电材料中引起电极化。这种策略可以将机械能转化为电能,从而将Cu II预催化剂还原为活性Cu I 铜催化的机械化学无溶剂ATRC反应中的所有物种。