Iodoethane → (R)-4a-Ethoxymethyl-1-(4-fluorophenyl)-1,4,4a,5,7,8-hexahydro-1,2,6-triazacyclopenta[b]naphthalene-6-carboxylic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

A solution of (R)-1-(4-fluorophenyl)-4a-hydroxymethyl-1,4,4a,5,7,8-hexahydro-1,2,6-triazacyclopenta[b]naphthalene-6-carboxylic acid tert-butyl ester (0.25 g) in tetrahydrofuran (2.5 mL) under argon at room temperature was treated sequentially with sodium hydride (0.072 g, 60% dispersion in mineral oil) and iodoethane (0.15 mL), and the resulting mixture was stirred at 50° C. for 2 hour. The solution was cooled to room temperature, diluted with ethyl acetate, washed with saturated aqueous ammonium chloride solution, water and brine, and dried over sodium sulfate. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel, eluting with a mixture of dichloromethane and ethyl acetate (9:1 by volume), to afford the title compound as an amber gum (0.21 g). LCMS (Method E): 428 (M+H)+, Retention time 4.7 minutes.

Provenance & Evidence