enantioselective reductive amination and amidation cascade reaction has been developed. Catalyzed by iridium or rhodiumcomplexes and with the help of sets of additives, the coupling of simple alkyl diamines and α-ketoesters occurs smoothly to afford the chiral cyclic piperazinone products. For disubstituted and monosubstituted alkyl diamine substrates, the corresponding reactions proceed through distinctive types
Synthesis of 1- and 4-substituted piperazin-2-ones via Jocic-type reactions with N-substituted diamines
作者:Michael S. Perryman、Matthew W. M. Earl、Sam Greatorex、Guy J. Clarkson、David J. Fox
DOI:10.1039/c4ob02311k
日期:——
Enantiomerically-enriched trichloromethyl-containing alcohols are transformed regioselectively into enantiomerically-enriched 1-substituted piperazinones by modified Jocic reactions.