Cationic rhodium(I) complex-catalysed asymmetric isomerisation of allylamines to optically active enamines
Abstract
The cationic rhodium(I) complex(+)- or (–)-2,2′bis(diphenylphosphino)-1,1′-binaphthyl(cyclo-octa-1,5-diene)rhodium perchlorate, effectively catalyses the isomersiation of N,N-diethylnerylamine or N,N-diethylgeranylamine to produce optically active N,N-diethylcitronellal-(E)-enamine with excellent enantioselectivity (> ca. 95% enantiomeric excess) and chemoselectivity (> ca. 98%).