Hydrazine hydrate (1:1) → HCID 178423567, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-(5-acetyl-4-methylthiazol-2-yl)-3-(4-(piperidine-1-carbonyl)benzyl)imidazolidin-2-one (0.43 g, 1.00 mmol) in N,N-dimethylacetamide (5 mL) was added N,N-dimethylacetamide dimethyl acetal (0.5 mL, 3.40 mmol). The reaction mixture was heated for 24 hours at 110° C., and hydrazine monohydrate (0.30 mL, 6.18 mmol) was added. The reaction mixture was heated for another 10 minutes at 110° C., then cooled to ambient temperature, diluted with ethyl acetate and washed with water. The organic phase was dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography to afford the title compound as a colorless solid in 46% yield (0.25 g): mp 182-183° C. (ethyl acetate): 1H NMR (300 MHz, CDCl3) δ 7.38-7.30 (m, 4H), 6.16 (s, 1H), 4.49 (s, 2H), 4.10-4.04 (m, 2H), 3.68 (br s, 2H), 3.46-3.31 (m, 4H), 2.46 (s, 3H), 2.32 (s, 3H), 1.56-1.49 (m, 6H); 13C NMR (75 MHz, CDCl3) δ 169.9, 156.6, 155.8, 143.6, 137.3, 136.1, 128.2, 127.4, 104.2, 48.7, 47.7, 41.8, 26.5, 25.6, 24.5, 21.1, 16.5: MS (ES+) m/z 465.2 (M+1).

Provenance & Evidence