Evaluation of Novel Synthetic Methods for the Preparation of the Sodium Channel Inhibitor, GW273225X

The evaluation of efficient synthetic methods for the preparation of (<i>R</i>)-2,4-diamino-5-(2,3-dichlorophenyl)-6-fluoromethylpyrimidine, GW273225X (<b>1</b>), is described. The initial synthesis using ethylfluoroacetate was evaluated against three alternative routes using either nucleophilic fluorination, electrophilic fluorination, or sodium fluoroacetate