The newly formed alcohol was protected as the BOM ether 33 with BOMCl and N,N-diisopropylethylamine. After removal of the TES protecting group with ammonium fluoride, the carbonate group in 34 was converted to a hydroxybenzoate group by action of phenyllithium  and the secondary alcohol to the acetate 35 by in situ reaction with acetic anhydride and DMAP.
The newly synthesized alcohol was safeguarded as BOM ether 33 using BOMCl and N,N-diisopropylethylamine. After removing the TES protective group with ammonium fluoride, the carbonate in compound 34 was converted into a hydroxybenzoate by reaction with phenyllithium, while the secondary alcohol was transformed into an acetate through a simultaneous reaction with acetic anhydride and DMAP.