Cyclohexyl isocyanate → HCID 10277271, compound

Participants

Reaction Steps

A solution of 4-(2,4-dichlorophenyl)-5-(4-chlorophenyl)-1-ethylimidazole (43 mg, 0.12 mmol) from Example 41, Step A (lower Rf isomer) in THF (2 mL) cooled to −70° C. in a dry ice/acetone bath was added 1.6N n-butyl lithium in hexanes (0.092 mL, 0.15 mmol). The reaction was stirred for 1 hr and then cyclohexyl isocyanate (0.032 mL, 0.25 mmol) was added via syringe. The reaction was allowed to warm to rt for 1 hr and was then quenched with aq. sodium bicarbonate and extracted twice with ethyl acetate. The organic layers were washed with brine, dried over sodium sulfate, and evaporated. The residue was purified by Prep TLC (3×1 mm, silica) (25% ethyl acetate in hexanes) to afford the title compound. HPLC/MS: 476 (M+1), 478 (M+3); Rt=4.99 min.

Provenance & Evidence