Hydrochloric Acid → benzyl 4-[(2RS)-4-oxoazetidin-2-yl]but-2-enoate

関与物質

反応手順

To a solution of benzyl 4-[(2RS)-1-(tert-butyldimethylsilyl)-4-oxoazetidin-2-yl]but-2-enoate (45 mg) in methanol was added 1 N hydrochloric acid (0.1 ml) at 0°. After stirring at room temperature for 2.5 hours, the reaction mixture was neutrallized to pH 7 with saturated aqueous sodium bicarbonate. The resultant solution was concentrated, taken up into ethyl acetate (15 ml), and washed in turn with water and brine. Drying over magnesium sulfate and removal of the solvent left an oil, which was chromatographed on a silica gel plate (developing solvent: 6% methanol in dichloromethane) to give benzyl 4-[(2RS)-4-oxoazetidin-2-yl]but-2-enoate (30 mg) as a crystalline solid.

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