Acetic Acid → HCID 68522195, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-(4-piperonylpiperazin-1-yl)-2-(4-hydroxyphenylamino)ethanone (1.00 g, 2.7 mmol) in methanol (10 mL) were added acetic acid (1.55 mL, 27 mmol), molecular sieves 3A1/16 (1.00 g), [(1-ethoxycyclopropyl)oxy]trimethylsilane (0.653 mL, 3.2 mmol) and sodium cyanoborohydride (770 mg, 12 mmol). The resulting solution was stirred for 16 hours at 60° C. This reaction solution was filtered and concentrated, and to the residue were added ethyl acetate and water. The aqueous layer was adjusted to pH 10 using aqueous 6 N sodium hydroxide. This layer was stirred for some time, and once insoluble matter had dissolved, the ethyl acetate layer was removed, and washed with aqueous 2 N sodium hydroxide and a saturated sodium bicarbonate solution, then dried over anhydrous magnesium sulfate. The solvent was evaporated, to thereby yield 770 mg of the title compound.

Provenance & Evidence