Palladium-Catalyzed <i>para</i>-Selective Allylation of 1-(Cyanomethyl)arenes with Allyl Acetates
作者:Rina Muto、Kenji Nagata、Yoshiki Nakazumi、Kaho Nakamura、Satoshi Ueno
DOI:10.1021/acs.orglett.3c00534
日期:2023.3.31
The Pd/PMe3-catalyzed allylation of 1-(cyanomethyl)naphthalenes with allyl acetates proved to be para- rather than α-regioselective. This reaction is thought to proceed through ligand attack of the para-carbon in the arenes, electronically enriched by a cyano-stabilized α-carbanion, to the (π-allyl)palladium and a 1,5-hydrogen shift of the para-hydrogen from the dearomatized intermediate.
Pd/PMe 3催化的 1-(氰甲基)萘与乙酸烯丙酯的烯丙基化被证明是对位而非 α-区域选择性。该反应被认为是通过芳烃中对位碳的配体攻击进行的,通过氰基稳定的 α-碳负离子电子富集到 (π-烯丙基) 钯和对位氢的1,5-氢位移来自脱芳构中间体。