Copper(I)–USY as a Ligand-Free and Recyclable Catalyst for Ullmann-Type <i>O</i>-, <i>N</i>-, <i>S</i>-, and <i>C</i>-Arylation Reactions: Scope and Application to Total Synthesis
作者:Tony Garnier、Mathieu Danel、Valentin Magné、Anthony Pujol、Valérie Bénéteau、Patrick Pale、Stefan Chassaing
DOI:10.1021/acs.joc.8b00620
日期:2018.6.15
copper(I)-doped zeolite CuI–USY proved to be a versatile, efficient, and recyclable catalyst for various Ullmann-type coupling reactions. Easy to prepare and cheap, this catalytic material enables the arylation and heteroarylation of diverse O-, N-, S-, and C-nucleophiles under ligand-free conditions while exhibiting large functional group compatibility. The facility of this catalyst to promote C–O bond
掺杂铜(I)的沸石Cu I- USY被证明是用于各种Ullmann型偶联反应的通用,高效且可回收的催化剂。这种催化材料易于制备且价格便宜,可在无配体的条件下实现多种O-,N-,S-和C-亲核试剂的芳基化和杂芳基化,同时具有大的官能团相容性。这种催化剂促进C-O键形成的功能在3-甲基obovatol(一种具有生物学相关性的天然存在的二芳基醚)的全合成中得到了进一步证明。从机理的角度出发,已经提出了两种竞争途径,这取决于亲核试剂的性质并与所获得的结果一致。