反应详情

To a solution of 3-Amino-5-(3-chloro-phenyl)-thiophene-2-carboxylic acid methyl ester (15 g, 56.0 mmol) in toluene (200 mL) was added a solution of allyl chloroformate (8.10 g, 67.2 mmol) in toluene (5.0 mL) and the resulting reaction solution was heated under reflux for 3 h. Toluene was stripped down and the crystals were collected and washed with ether/hexane to afford a yellow crystalline compound, mp 101-103° C. 1H NMR (DMSO-d6) δ3.85 (s, 3H), 4.68-4.71 (d, 2H, J=5.46 Hz), 5.26-5.30 (dd, 1H, J=1.35, 9.84 Hz), 5.36-5.42 (dd, 1H, J=1.57, 15.68 Hz), 5.96(m, 2H), 7.50-7.52 (m, 2H), 7.67-7.71 (m, 1H), 7.79 (s, 1H), 8.10 (s, 1H); MS(+APCI) m/z 352(M+H); Anal. Calc. For C16H14ClNO4S: C, 54.63; H, 4.01; N, 3.97. Found: C, 54.05; H, 4.17; N, 3.84.

1. customthe resulting reaction solution
2. temperaturewas heated
3. temperatureunder reflux for 3 h
4. customthe crystals were collected
5. washwashed with ether/hexane
6. customto afford a yellow crystalline compound, mp 101-103° C