Arylation of Allyl Alcohols in Organic and Aqueous Media Catalyzed by Oxime-Derived Palladacycles: Synthesis of β-Arylated Carbonyl Compounds
作者:Emilio Alacid、Carmen Nájera
DOI:10.1002/adsc.200700301
日期:2007.12.10
oxime-derived palladacycle catalyzes the Mizoroki–Heck reaction of allyl alcohols with aryl iodides, bromides, and chlorides in aqueous and organic solvents. The reaction takes place in the presence of dicyclohexylmethylamine or cesium carbonate as bases, the addition of tetrabutylammonium bromide (TBAB) as additive for aryl bromides and chlorides being necessary. Under these reaction conditions, β-arylated aldehydes
Copper and neocuproine catalysed synthesis of cinnamyl ether derivatives directly from secondary and tertiary cinnamyl alcohols
作者:Zhenjiao Yang、Yongsheng Zhang、Xingxian Lv、Yang Yang、Chunhao Jiang、Xiaoyan He、Guoliang Chen、Gang Huang、Xiuhong Lu
DOI:10.1039/d2gc01602h
日期:——
The skeletons of secondary and tertiary cinnamyl alcohols are found ubiquitously in natural products and commercial drugs. Due to the easy dehydration of their structures, the etherification of such compounds is often difficult. A new method for the synthesis of secondary and tertiary cinnamyl ether derivatives, employing copper sulfate pentahydrate (CuSO4·5H2O) as a catalyst and neocuproine as a ligand
Palladium-catalyzedreactions of various haloanilines with 1,1-dimethylallyl alcohol were carried out in the presence of a hydrophilic ligand, 3,3′,3′′-phosphinidyne tris(benzenesulfonic acid) trisodium salt (TPPTS), or a lipophilic phosphine ligand, 1,1′-bis(diphenylphosphino)ferrocene (DPPF). The reactions proceeded chemoselectively in aqueous solvent to give C-vinylated products under basic conditions