A General Cyclocarbonylation of Aryl Bromides and Triflates with Acetylenes: Palladium-Catalyzed Synthesis of 3-Alkylidenefuran-2-ones
作者:Xiao-Feng Wu、Basker Sundararaju、Pazhamalai Anbarasan、Helfried Neumann、Pierre H. Dixneuf、Matthias Beller
DOI:10.1002/chem.201101083
日期:2011.7.11
Making use of CO: An improved efficient synthesis of 5‐aryl‐3‐alkylidenefuran‐2‐ones has been developed (see scheme). Starting from readily available (hetero)arylbromides or aryltriflates and alkynes, furanones were produced in good yields through a double carbonylation process. To illustrate the generality of the method more than 25 furanone derivatives were synthesized, including the permethylated
Palladium-Catalyzed Carbonylative Coupling of Aryl Iodides and Benzyl Acetylenes to 3-Alkylidenefuran-2-ones under Mild Conditions and Its Density Functional Theory Modeling
A general and efficient method for the palladium‐catalyzed carbonylativecoupling of aryliodides to benzylacetylenes has been developed. Various furanones have been prepared in excellent yields from their corresponding benzylacetylenes at room temperature under a CO atmosphere. For aliphatic alkynes, their corresponding alkynones were obtained in good yields. Detailed DFT calculations have also
Stereoselective synthesis of <i>E</i>-3-(arylmethylidene)-5-(alkyl/aryl)-2(3<i>H</i>)-furanones by sequential hydroacyloxylation-Mizoroki–Heck reactions of iodoalkynes
作者:Gopinathan Muthusamy、Sunil V. Pansare
DOI:10.1039/c8ob02063a
日期:——
stereoselective synthesis of E-3-(arylidene)-5-(alkyl/aryl)-2(3H)-furanones was developed. The methodology features regioselective addition of β-aryl acrylic acids to iodoacetylenes to furnish the Z-acyloxy iodoalkenes. A stereoselective 5-exo-trig Mizoroki–Heck reaction of the acyloxy iodoalkenes generates the target E-2(3H)-furanones. The approach was applied in a formal synthesis of the naturally