Outline of the synthesis and utilization of
2-debenzoyl-7,13-diacetylbaccatin III. Step a, methylene
chloride, acetic anhydride,
4-(N,N′-dimethylamino)pyridine, triethylamine,
25°C, 18 h. Step b, tetrahydrofuran,
bis(2-methoxyethoxy)aluminum hydride (>65% in toluene), 0°C, 30
min. Step c indicates the reaction catalyzed by taxane
2α-O-benzoyltransferase in the presence of benzoyl-CoA.