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409
References
4.3.7. Compound (4g)
m.p.: 230–232 8C [22g]. 1H NMR (500 MHz, CDCl3):
1H, J = 8.5 Hz), 8.47 (s, 1H), 8.32 (d, 1H, J = 8.5 Hz), 8.20 (d, 2H,
J = 8.2 Hz), 7.85 (m, 1H), 7.70 (m, 1H), 7.64 (m, 2H).
d
= 8.65 (d,
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4.3.10. Compound (4j)
m.p.: 324 8C [22j]. 1HNMR (500 MHz, CDCl3):
d = 8.60 (d, 1H,
J = 8.0 Hz), 8.30 (s, 1H), 8.20–8.25 (m, 2H), 8.10 (d, 1H, J = 8.1 Hz),
7.80 (t, 1H, J = 7.6 Hz), 7.70 (t, 1H, J = 7.5 Hz), 6.90–7.00 (m, 2H).
4.3.11. Compound (4k)
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d = 8.58 (s,
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4.3.12. Compound (4l)
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d = 8.56 (s,
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m.p.: 260–262 8C [22l]. 1H NMR (500 MHz, CDCl3):
d = 8.83 (d,
1H, J = 8.4 Hz), 8.4 (s, 1H), 8.21 (s, 1H), 8.2 (d, 2H, J = 8.9 Hz), 7.57
(m, 1H), 7.34 (d, 2H, J = 10.5 Hz).
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Acknowledgements
This research was financially supported by the National Nature
Science Foundation of China (20672035) and Key Laboratory of
Organofluorine Chemistry, Shanghai Institute of Organic Chem-
istry, Chinese Academy of Sciences.