Tetrahydrofuran → 1-(5-Tert-butyl-2-(1-(2-(dimethylamino)ethyl)-3,3-dimethyl-2-oxopiperazine-4-carbonyl)thiophen-3-yl)-3-(2,3-dichlorophenyl)urea

関与物質

反応条件

反応手順

A mixture of 4-(4-amino-2-tert-butylthiophene-5-carbonyl)-1-(2-(dimethylamino)ethyl)-3,3-dimethylpiperazin-2-one (0.035 g, 0.092 mmol), dichlorophenyl isocyanate (0.019 g, 0.10 mmol), and THF (2 mL) was heated at 75° C. for 2 hours. The reaction mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate, dried, the solvent eliminated under vacuum and the crude product was purified by preparative thin layer chromatography (dichloromethane:methanol, 95:5) to afford 0.035 g of 1-(5-tert-butyl-2-(1-(2-(dimethylamino)ethyl)-3,3-dimethyl-2-oxopiperazine-4-carbonyl)thiophen-3-yl)-3-(2,3-dichlorophenyl)urea. 1H NMR (400 MHz, acetone-d6): δ (ppm) 9.57 (bs, 1H); 8.86 (bs, 1H); 8.17 (d, 1H); 7.65 (s, 1H); 7.30 (m, 2H); 3.90 (m, 2H); 3.60 (m, 2H); 3.50 (t, 2H); 2.43 (t, 2H); 2.20 (s, 6H); 1.70 (s, 6H); 1.40 (s, 9H).

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