反应详情

温度

100 °C

To form 2,4-dimethoxy-cyclopropylbenzene (4cc), the general procedure was followed using 1-chloro-2,4-dimethoxybenzene (3b) (173 mg, 1.00 mmol), cyclopropyl MIDA boronate (2h) (236 mg, 1.20 mmol), SPhos (41 mg, 0.10 mmol) and Pd(OAc)2 (11 mg, 0.048 mmol). The reaction temperature was modified so that the reaction mixture was heated to 100° C. for 6 h. Compound 4cc was isolated as a colorless liquid (175 mg, 97%). TLC (hexanes:EtOAc 9:1) Rf=0.65, visualized by UV (254 nm). 1H-NMR (500 MHz, CDCl3w/ TMS) δ 6.77 (d, J=8.5 Hz, 1H), 6.44 (d, J=2.5 Hz, 1H), 6.39 (dd, J=8.5, 2.5 Hz, 1H), 3.83 (s, 3H), 3.77 (s, 3H), 2.03 (m, 1H), 0.85 (m, 2H), 0.57 (m, 2H). 13C-NMR (125 MHz, CDCl3) δ 159.2, 158.6, 125.7, 124.2, 103.8, 98.4, 55.5, 55.3, 9.0, 6.9. HRMS (EI+) Calculated for C11H14O2 (M)+: 178.0994, Found: 178.0995. IR (thin film, cm−1) 3080, 3000, 2955, 2940, 2835, 1615, 1585, 1510, 1464, 1439, 1416, 1370, 1319, 1290, 1261, 1209, 1172, 1158, 1117, 1062, 1037, 938, 884, 834, 823, 799.