Synthesis of phosphorylcholines possessing 5,6- or 14,15-epoxyisoprostane A2 at sn-2 position

Use of the PMBOCH2 group (PMB: p-MeOC6H4CH2) as a substitute of CO2H provided high level of reproducibility and efficiency in construction of the full structure of 5,6-epoxyisoprostane A2. After the construction, the PMBOCH2 group was converted to CO2H by using (1) DDQ, (2) SO3·pyridine and (3) NaClO2 at pH 7. The acid, thus synthesized, was condensed with lyso-PC to furnish one of the title compounds. Similarly, 14,15-regioisomer was synthesized.