Nickel-catalysed electrochemical coupling of 2- and 3-bromothiophene with alkyl and alkenyl halides
摘要:
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.