Sodium Hydroxide → HCID 22710609, compound

Participants

Reaction Steps

S-Methylisothiourea sulfate (16.44 g, 59.06 mmol, 1.5 eq.) and tert-butyl 3-((dimethylamino)-methylene)-4-oxopiperidine-1-carboxylate (10.0 g, 39.37 mmol, 1.0 eq.) were taken up in water (40 ml); 1 M NaOH solution (50 ml) was added and stirring was carried out for 1 hour at 80° C. After monitoring by TLC, the reaction mixture was diluted with water (100 ml) and extracted with DCM (2×150 ml). The combined org. phases were washed with sat. NaCl solution (100 ml), dried over sodium sulfate, concentrated under reduced pressure and purified by column chromatography (silica gel, 25% ethyl acetate in hexane). Yield: 40% (4.5 g, 16.01 mmol)

Provenance & Evidence