Two enantioselective syntheses of a precursor of the biologically most active isomer of CGA 80000 (clozylacon)
作者:H.P. Buser、B. Pugin、F. Spindler、M. Sutter
DOI:10.1016/s0040-4020(01)86523-6
日期:1991.7
The unchlorinated precursor 4 of CGA 80000 (1) was synthesized enantioselectively by two conceptionally different routes: a) by a ''chiral pool'' approach starting from L-malic acid and b) by enantioselective hydrogenation of an enamide intermediate, catalyzed by chiral Rh- or Ru-phosphine-complexes.