作者:Seebach, Dieter、Adam, Geo、Gees, Thomas、Schiess, Martin、Weigand, Wolfgang
DOI:——
日期:——
Resolution of (±)-mandelic- and (±)-2-(chlorophenoxy)propionic-acid derivatives by crystallization of their diastereomeric amides with (R)- or (S)-α-arylethylamines
An alternative and cost effective route for the resolution in high ees (95-99%) of (+/-)-mandelic and (+/-)-2-(chlorophenoxy)propionic- acid derivatives is reported. The key step involves the covalent derivatization and separation of their diastereomeric amides with (R)- or (S)-alpha-arylethylamines. (C) 1999 Elsevier Science Ltd. All rights reserved.
CARLSON, ASA;GYLLENHAAL, OLLE, J. CHROMATOGR., 508,(1990) N, C. 333-339
作者:SEEBACH, DIETER、ADAM, GEO、GEES, THOMAS、SCHIESS, MARTIN、WEIGAND, WOLFGANG
DOI:——
日期:——
Catalytic Asymmetric Transfer Hydrogenation of Ketones Using [Ru(p-cymene)Cl2]2 with Chiral Amino Alcohol Ligands
作者:Sudhindra H. Deshpande、Ashutosh A. Kelkar、Rajesh G. Gonnade、Savita K. Shingote、Raghunath V. Chaudhari
DOI:10.1007/s10562-010-0408-y
日期:2010.9
Catalytic asymmetrictransferhydrogenation of aromatic alkyl ketones has been investigated using [Ru(p-cymene)Cl2]2 and new derivatives of β-amino alcohols synthesized from (S)-(−)-lactic acid and mandelic acid as ligands. Chiral secondary alcohols were obtained with good to excellent conversion (60–90%) and moderate to good enantioselectivities (40–86%).Graphical AbstractAsymmetric transfer hydrogenation