Pd/Rh Dual Catalysis: Tandem Isomerization–Allylation to Access α-Quaternary Carbonyl Compounds
作者:Jeanne Masson-Makdissi、Justin Ching、Cian M. Reid、Mark Lautens
DOI:10.1021/acscatal.2c04818
日期:2022.12.16
A dual metal approach enables the use of unsymmetrical diallyl carbonates as viable enolate precursors for allylic alkylation reactions, allowing facile access to various α-quaternary allylated aldehydes and ketones. This methodology features a regioselective Pd-catalyzed decarboxylative oxidative addition, forming an electrophilic Pd π-allyl species and releasing an allylic alkoxide, which undergoes
双金属方法可以使用不对称的二烯丙基碳酸酯作为烯丙基烷基化反应的可行烯醇化物前体,从而可以轻松获得各种 α-季烯丙基化醛和酮。该方法的特点是区域选择性 Pd 催化脱羧氧化加成,形成亲电子 Pd π-烯丙基物质并释放烯丙基醇盐,后者在 Rh 催化下原位异构化为烯醇化物。Pd π-烯丙基物质和 Rh-烯醇化物亲核试剂的重组然后提供 α-季羰基化合物。