Palladium-Catalyzed Reactions of Butadiene and Isoprene

摘要: Publisher Summary This chapter focuses on the reactions of butadiene and isoprene in presence palladium catalysts, also related catalyzed by nickel complexes are considered for comparison. Unlike catalysts undergo neither cyclodimerization nor cyclotrimerization to form 1,5-cyclooctadiene (COD) or 1,5,9-cyclododecatriene (CDT). The highlights that a mixture divinylcyclobutanes was obtained from using salts with non-complexing anions such as perchlorate boron tetrafluoride. is big difference between catalyses nickel. There two main types conjugated dienes complexes. first type linear dimerization 1,3,7-octatriene absence nucleophile. most characteristic useful reaction incorporation certain nucleophiles. second cocyclization C=O bonds aldehydes C=N isocyanates Schiff bases six-membered heterocyclic compounds (19) vinyl groups, expressed following general scheme. These possible only catalysts.