A convenient synthesis of 1-azabicycloalkanes and their lactams cuprates of formamidines
作者:Philip D. Edwards、A.I. Meyers
DOI:10.1016/s0040-4039(01)80067-8
日期:1984.1
Piperidine and pyrrolidine formamidines, transformed into their α-metalloderivatives are alkylated with bifunctional electrophiles and cyclized, on formamidine removal, to the title compounds.
A highly efficient enantio- and diastereoselective synthesis of chiral cis-β-N-alkyl/arylamino cyclic alcohols has been realized by asymmetric hydrogenation of racemic α-amino cyclic ketones via DKR catalyzed by [RuCl2((S)-Xyl-SDP)((R,R)-DPEN)]. The enantioselectivities of the reaction were up to 99.9% ee with 99:1 cis-selectivities. A practical catalytic asymmetric synthesis of all four isomers of