反应详情

To a stirred, cooled (0° C.) solution of product of 11E (0.55 g, 1.23 mmol) and TEA (0.5 g, 5.0 mmol) in DCM (12 mL) was added drop wise a solution of 4,6-dichloropyrimidine-5-carbonyl chloride (0.26 g, 1.23 mmol) in DCM (5 mL). After 6 h, the reaction was concentrated in vacuo, diluted with ethyl acetate, and washed with water (2×10 mL) and saturated aqueous brine. The organic layer was dried over sodium sulphate, filtered and concentrated in vacuo to afford oil. The residue was purified by flash chromatography using 12% ethyl acetate in hexane as eluent to afford title compound (0.35 g, 46%) as an oil. 1H NMR (400 MHz, DMSO-d6): δ 8.75 (s, 1H), 7.75 (s, 1H), 7.46 (m, 3H), 7.36 (m, 4H), 5.94 (m, 1H), 5.34 (s, 2H), 5.08 (m, 1H), 4.96 (m, 1H), 4.82 (m, 2H), 4.0 (m, 2H), 3.77 (t, J=4.8 Hz, 2H), 0.8 (s, 9H), 0.01 (s, 6H); ESI-MS m/z=611 (M+H)+.

1. concentrationthe reaction was concentrated in vacuo
2. additiondiluted with ethyl acetate
3. washwashed with water (2×10 mL) and saturated aqueous brine
4. dry with materialThe organic layer was dried over sodium sulphate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customto afford oil
8. customThe residue was purified by flash chromatography