2,4-dione catalyzed by PdCl2(CH3CN)2 (5 mol %) in the presence of CuCl2 (2.5 equiv) at room temperature for 3 h formed 2-acetyl-3,6,6-trimethyl-2-cyclohexenone in 96% isolated yield. Palladium-catalyzed intramolecular oxidative alkylation tolerated a range of substitution and was applicable to the synthesis of spirobicyclic compounds and to the cyclization of zeta-alkenyl beta-keto esters.
5,5-二
甲基-8-
壬烯-
2,4-二
酮由 PdCl2(CH3CN)2(5 mol%)在 CuCl2(2.5 当量)存在下在室温下反应 3 小时,形成 2-乙酰-3 ,6,6-三
甲基-2-
环己烯酮的分离产率为 96%。
钯催化的分子内
氧化烷基化耐受一系列取代,适用于螺
双环化合物的合成和 zeta-
烯基 β-
酮酯的环化。