Acetone → [6-chloro-2-trifluoromethyl-7-(2,4,6-trimethyl-phenyl)-7H-imidazo[1,2-a]imidazol-3-yl]-methanol

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To a solution of 6-chloro-2-trifluoromethyl-7-(2,4,6-trimethyl-phenyl)-7H-imidazo[1,2-a]imidazole-3-carboxylic acid ethyl ester (978.3 mg, 1.904 mmol) in tetrahydrofuran (100 mL) at 0° C. was added a 1.0M solution of lithium aluminum hydride in tetrahydrofuran (5.71 mL, 5.71 mmol). The resulting solution was stirred at 0° C. for 10 min. Acetone (5 mL) was added and the solution was added via cannula to a vigorously stirred ice-cold solution of Rochelle's salt (100 mL). The product was extracted with ethyl acetate (5×50 mL) and the combined organic extracts were dried over anhydrous Na2SO4. The solvent was removed in vacuo and the crude mixture was chromatographed on short silica gel column (hexanes-ethyl acetate 4:1) to give the desired product (614.8 mg, 90%) which was pure by LC-MS. LC/MS: tR=1.25 min., MS: [M+H]=358.

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