2- or 3-bromothiophene are efficiently coupled with activated alkyl chlorides (alpha-chloroesters, alpha-chloroketones, alpha-chloronitriles), benzyl chloride or vinyl halides, in a one step electrochemical reaction, using the sacrificial anode process and catalysis by NiBr2-2,2'-bipyridine (bipy). (C) 1997 Elsevier Science Ltd.
Generation of Allylmagnesium Reagents by Hydromagnesiation of 2‐Aryl‐1,3‐dienes
Magnesium hydride, generated in situ by solvothermal treatment of sodium hydride and magnesium iodide in tetrahydrofuran, was found capable of inducing regio and stereocontrolled hydromagnesiation of 2-aryl-1,3-dienes to form allylmagnesium species. Downstream functionalization of the resulting allylmagnesium species with various electrophiles provided synthetically valuable synthons such as homoallylic