Vicinal dihalogenation of alkenes is a fundamental textbook reaction. Such reactions are still mainly performed by traditional methods that imply the use of toxic, corrosive and not easy to handle reagents. Herein, we report a simple, efficient and eco-friendly alternative that challenges those conventional methods and allows not only the homonuclear but also the heteronuclear dihalogenation of alkenes
A general process for the efficient synthesis of vinylsulfones has been developed using commercially available sulfinic acid sodium salts and dibromides. A variety of phenyl and methyl vinylsulfones have been formed in good yields, in the absence of any catalyst.
Abstract Bromination of alkenes and alkynes has efficiently been carried out at room temperature in short reaction times using KBr and diacetoxy iodobenzene in CH2Cl2-H2O (1:1) to prepare the corresponding trans-dibromo compounds in excellent yields.
(3E,5Z)-1,3,5-Undecatriene () having 98.2% stereoisomeric purity has been prepared by a new and expeditious route involving two selective Pd-catalyzed carbon-carbon bond forming reactions. The key step of this synthesis is a highly diastereoselective Pd-catalyzed cross-coupling reaction between 1-heptynylzinc chloride () and a molar excess of (E)/(Z)-1,2-dibromoethylene (). Another highly diastereoselective