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1
6. 10 H -NMR (CDCl ) δ:7.69 (1H, d, J = 8.0 Hz), 6.80 (1H, d, J = 8.0 Hz), 6.64 (1H, s), 4.60 (1H, td,
3
J = 8.0, 4.6 Hz), 3.87 (3H, s), 3.74 (3H, s), 3.14-3.01 (2H, m), 2.36-2.29 (1H, m), 2.17-2.13 (1H, m).
1
3
2
C-NMR (CDCl ) δ: 200.10, 170.96, 158.59, 157.06 (q, J = 37.6 Hz), 134.86, 130.94, 128.09,
3
CF
1
1
1
2
2
21.73 (q, J = 273.9 Hz), 118.75, 115.60 (q, J = 288.3 Hz), 109.47, 55.60, 52.80, 52.41, 39.67,
CF CF
2
+
8.33 (q, J = 40.8 Hz), 25.77. ESI-MS 456 (MH ). [α] - +25.00 (c 2.0 CHCl ), [α] - 26.50 (c
CF
D
3
D
.0 CHCl3).
1
7. Y. Ambroise, C. Miskowski, G. Djega-Mariadassou, and B. Rousseau, J. Org. Chem., 2000, 65,
183.
7
1
1
8. M. Hashimoto, Y. Hatanaka, and K. Nabeta, Heterocycles, 2003, 59, 395.
1
9. 11 H -NMR (CDCl ) δ: 7.08 (1H, d, J = 8.0 Hz), 6.71 (1H, d, J = 8.0 Hz), 6.57 (1H, s), 4.65 (1H, td,
3
J = 7.7, 5.3 Hz), 3.78 (3H, s), 3.74 (3H, s), 2.65-2.56 (2H, m), 1.96-1.92 (1H, m), 1.76-1.73 (1H, m).
1
3
2
1
.61-1.56 (2H,m). C-NMR (CDCl ) δ: 171.58, 157.72, 156.97 (q, J = 37.6 Hz), 131.86, 130.33,
3 CF