📜2-乙酰基环己酮置于四(三苯基膦)钯 三乙胺,Lithium Bromide体系中,用 四氢呋喃,乙二醇二甲醚 作为反应溶剂,化学反应 48.0H,反应生成 乙酰基环已烯
参考文献:Palladium-Catalyzed Cross-Coupling Of .Beta.-(Methanesulfonyl)Oxyenones With Organostannanes
标题:Palladium-Catalyzed Cross-Coupling Of .Beta.-(Methanesulfonyl)Oxyenones With Organostannanes
摘要:Beta-(Methanesulfonyl)Oxy Enones,Derived From 1,3-Diones,Cross-Couple With Vinylstannanes In 50-80% Yields When A Substoichiometric Amount Of Pd(Pph3)4 And Stoichiometric Lithium Bromide Are Used. Phenyltributylstannane Affords Low Yields Of Cross-Coupled Product. Tetrabutyltin,Tributyltin Hydride,And Ethynyltributyltin Do Not Couple Under The Reaction Conditions. The Reaction Is Proposed To Involve In Situ Formation Of The Beta-Bromo Enone,Oxidative Addition To The Pd(0) Catalyst,Transmetalation,And Reductive Elimination To Afford Cross-Coupled Products. The Analogous Enol Phosphates Undergo Coupling In Low Yields,The Major Product Resulting From Regeneration Of The 1,3-Dione.
DOI:10.1021/jo00004A028