The C-13 side-chain precursor (4R,5S)-2,4-diphenyl-4,5-dihydroxazole-5- carboxylic acid was prepared from Cinnamic acid via epoxidation of C=C double bond with Oxone,benzyl protection, Ritter reaction, hydrolyzation, and resolution with (+)-Quinidine. Thus by linking it to 7-TES-Baccatin Ⅲ, taxol could be synthesized. The yield is 4.5% in the overall steps. Some intermediates and the target product were identified by means of 1H-NMR, 13C-NMR and MS.