反应详情

温度

90 °C

To the solution of tert-butyl 2-(2,2-dimethylchroman-6-sulfonamido)acetate (500 mg, 1.407 mmol) in MeCN (15 mL) was added resin-supported BEMP (786 mg, 1.547 mmol) and 1-bromo-4-(bromomethyl)-2-methylbenzene (631 mg, 2.391 mmol). The mixture was heated in a microwave synthesizer at 90° C. for 3 hours. The reaction mixture was filtered, rinsed alternatively by dichloromethane and methanol. The filtrate was concentrated to give a reddish orange residue, which was purified by silica chromatography to obtain a white powder (516 mg, 68% yield). 1H NMR (500 MHz, CDCl3) δ 7.58 (d, J=2.2 Hz, 1H), 7.57 (s, 1H), 7.44 (d, J=8.1 Hz, 1H), 7.09 (s, 1H), 6.92 (dd, J=8.2, 2.1 Hz, 1H), 6.84 (d, J=9.3 Hz, 1H), 4.42 (s, 2H), 3.78 (s, 2H), 2.79 (t, J=6.8 Hz, 2H), 2.34 (s, 3H), 1.82 (t, J=6.7 Hz, 2HLRMS [ESI, MH+] m/z calcd for C25H33BrNO5S 538.13, found 538.1.

1. filtrationThe reaction mixture was filtered
2. washrinsed alternatively by dichloromethane and methanol
3. concentrationThe filtrate was concentrated
4. customto give a reddish orange residue, which
5. customwas purified by silica chromatography