How is 2-Amino-9-[4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-1,9-dihydro-6H-purin-6-one (CAS: 1367369-77-4) typically synthesized?

2-Amino-9-[4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-1,9-dihydro-6H-purin-6-one is typically synthesized via a multi-step process involving the reaction of a cyclopentene derivative with a guanidine compound. The reaction involves the use of a catalytic amount of a strong base, such as sodium hydride, and is performed in an anhydrous solvent like dimethylformamide. The yield is moderate to high, depending on the purity of the starting materials and reaction conditions.