(3R,4S)-3-Hydroxy-4-phenyl-2-azetidinone

(-)β-lactam, it is a very potential chiral drug intermediate, it has two isomers namely (3R,4S) configuration and (3S,4R), where (3R,4S) The derivative of the configurational isomer, the paclitaxel side chain C-13, is an important chiral precursor for the preparation of docetaxel, one of the most promising new drugs in cancer clinical chemotherapy.