Asymmetric synthesis of dipeptides by means of homogeneous hydrogenation catalyzed by chiral rhodium complexes
作者:Iwao Ojima、Tadashi Suzuki
DOI:10.1016/s0040-4039(00)71381-5
日期:——
Asymmetrichydrogenation of dehydrodipeptides, α-acylaminocinnamoyl-(S)-amino esters, catalyzed by rhodium complexes with chiral diphosphines gave either (R)-N-acylphenylalanyl-(S)-amino esters or (S)-N-acylphenylalanyl-(S)-amino esters with high diastereomeric purity up to 98–99% on using proper chiral ligands.
Partial resolution through chiral synthesis using a racemic mixture
作者:Sana El-Baba、Jean-Claude Poulin、Henri B. Kagan
DOI:10.1016/s0040-4020(01)98803-9
日期:——
A racemic mixture of a compound bearing a reactive prochiral center can partially react with a chiral reagent ; diastereomeric products are formed and the starting material is kinetically resolved. The relationships between the relative amounts and the enantiomeric excesses of reaction products and recovered starting material are discussed. Applications are given for asymmetric hydrogenation of racemic
Stereoselective synthesis of dipeptides by asymmetric reduction of dehydropeptides catalyzed by chiral rhodium complexes
作者:Dominique Meyer、Jean Claude Poulin、Henri B. Kagan、Huguette Levine-Pinto、Jean Louis Morgat、Pierre Fromageot
DOI:10.1021/jo01311a026
日期:1980.11
Chiral sulfonated phosphines VIII. Hydrogenation of dehydropeptides in a two-phase system
作者:M. Laghmari、D. Sinou、A. Masdeu、C. Claver
DOI:10.1016/0022-328x(92)88019-f
日期:1992.10
Dehydropeptides have been reduced in a two-phase system using [Rh(COD)Cl}2] associated with chiral water-soluble ligands derived from cyclobutanediop and BDPP. Diastereoselectivities of up to 87% were obtained with tetrasulfonated BDPP.