The condensation of BMS-207147 (I) with 3-(chloromethyl)benzoic acid chloromethyl ester (II) (obtained by esterification of 3-(chloromethyl)benzoyl chloride (III) with paraformaldehyde and ZnCl2) by means of KH in THF gives the adduct (IV), which is condensed with phosphoric acid di-tert-butyl ester (V) to yield the phosphate (V). Finally, this compound is hydrolyzed with TFA in dichloromethane and treated with NaHCO3 to provide the target sodium salt.