5-Hexyn-1-ol → 2,2,2-trifluoro-N-(4-(6-hydroxyhex-1-yn-1-yl)phenyl)acetamide

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Reaction Steps

A solution of Intermediate 32 (2.7 g, 8.5 mmol, prepared according to Melissaris, A. P. and Litt, M. H. J Org Chem 1994, 59, 5818-5821) in DMF (26 mL) was treated successively with tetra-n-butylammonium acetate (3.8 g, 13 mmol) and palladium (II) acetate (57 mg, 0.26 mmol). The mixture was degassed with nitrogen and then treated with 5-hexyn-1-ol (0.93 mL, 8.5 mmol). After four hours of stirring at room temperature, additional quantities of the following reagents were added: tetra-n-butylammonium acetate (1 g), palladium (II) acetate (57 mg), and 5-hexyn-1-ol (1 mL). After stirring overnight at room temperature, the mixture was partitioned between diethyl ether and water. The aqueous phase was extracted four times with diethyl ether. The combined organic extracts were washed twice with water and once with saturated aqueous sodium chloride solution before drying over anhydrous magnesium sulfate, filtration and concentration under reduced pressure to provide the title compound as brown syrup that partially solidified under vacuum. ES/MS calcd. for C14H15F3NO2+: 286.1. Found m/z=286.2 (M+H)+

Provenance & Evidence