Tetrahydrofuran → HCID 86612116, compound

Participants

Reaction Steps

To a cold (0° C.) solution of 8-(4-fluorobenzyl)-10-toluenesulfonyloxy-3,4,7,8-tetrahydropyrido-[3′,4′:4,5]pyrrolo[1,2-a]pyrazine-1,9(2H,6H)-dione (60 mg, 0.12 mmol) in anhydrous DMF (1 mL), a solution of lithium bis(trimethylsilyl)amide in THF (1 M, 1.5 eq) was added. The mixture was stirred at the same temperature for 30 minutes. A solution of 4-bromomethylpyridine in diethyl ether (generated from the corresponding hydrobromide salt through partition between aq sodium carbonate and ether, and drying the solution by passing it through a plug of activated basic alumina). The reaction mixture was stirred at rt for one hour and concentrated under vacuum. The residue was subjected to reverse phase preparative HPLC purification. Collection and lyophilization of appropriate fractions provided the titled compounds.

Provenance & Evidence