Enantiomeric phosphonate analogs of the paclitaxel C-13 side chain
摘要:
Both enantiomers of syn diethyl 2-(benzoylamino)-1-hydroxy-2-phenylethylphosphonate have been obtained by resolution via O-methylmandelate derivatives. Removal of the resolving ester moiety was easily achieved by ammonolysis with no trace of the retro-Abramov reaction. Absolute configurations of the enantiomeric phosphonate analogs were established from H-1 (the Trost model) and P-31 NMR data of the O-methylmandelate derivatives. (C) 1999 Elsevier Science Ltd. All rights reserved.
Enantiomeric phosphonate analogs of the paclitaxel C-13 side chain
摘要:
Both enantiomers of syn diethyl 2-(benzoylamino)-1-hydroxy-2-phenylethylphosphonate have been obtained by resolution via O-methylmandelate derivatives. Removal of the resolving ester moiety was easily achieved by ammonolysis with no trace of the retro-Abramov reaction. Absolute configurations of the enantiomeric phosphonate analogs were established from H-1 (the Trost model) and P-31 NMR data of the O-methylmandelate derivatives. (C) 1999 Elsevier Science Ltd. All rights reserved.