copper-catalyzed coupling reaction of 2-pyridinesulfonates with Grignardreagents revealed that reactions with catalytic Cu(OTf)2 were completed in <40 min. The results differed from those of the previous CuI-catalyzed reactions of tosylates in the presence of additives (LiOMe and TMEDA) for 12–24 h. It was shown that the preferred coordination of the leaving group to the reagents accelerated the reaction
The enereaction of triazolinedione with unsymmetrical cis-alkenes is regiospecific and shows a preferential abstraction of the allylic hydrogens on the larger alkyl group of the double bond.