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G. An et al.
PAPER
Cyclohexanecarboxylic Acid (Table 5, Entry 23)29
1H NMR (300 MHz, CDCl3): d = 11.76 (br s, 1 H), 2.11–1.15 (br m,
11 H).
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2-Methylpent-2-enoic Acid (Table 5, Entry 24)
1H NMR (300 MHz, DMSO-d6): d = 12.16 (br s, 1 H), 6.65 (t,
J = 7.2 Hz, 1 H), 2.15 (m, 2 H), 1.74 (s, 3 H) 1.00 (m, 3 H).
Hexanoic Acid (Table 5, Entry 25)
1H NMR (300 MHz, CDCl3): d = 12.00–10.00 (br s, 1 H), 2.36 (t,
J = 7.5 Hz, 2 H), 1.65 (quint, J = 7.5 Hz, 2 H), 1.37–1.31 (m, 4 H),
0.91 (t, J = 6.9 Hz, 3 H).
2-Furoic Acid (Table 5, Entry 26)
1H NMR (300 MHz, DMSO-d6): d = 13.0 (br s, 1 H, CO2H), 8.30
(s, 1 H, H-1), 7.78 (s, 1 H, H-2), 6.77 (s, 1 H, H-3).
Pyrrole-2-carboxylic Acid (Table 5, Entry 27)
1H NMR (300 MHz, DMSO-d6): d = 12.20 (br s, 1 H), 11.69 (br s,
1H), 6.94 (s, 1 H), 6.71 (s, 1 H), 6.11 (s, 1 H).
4-Methylimidazole-5-carboxylic Acid (Table 5, Entry 28)30
1H NMR (300 MHz, DMSO-d6): d = 12.78 (br s, 1 H,), 9.78 (s, 1 H,
NH), 7.75 (br s, 1 H, CH), 2.42 (s, 3 H).
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Isonicotonic Acid (Table 5, Entry 29)
1H NMR (300 MHz, DMSO-d6): d = 8.76 (d, J = 3.6 Hz, 2 H), 7.80
(d, J = 3.6 Hz, 2 H).
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Pyridine-2-carboxylic Acid (Table 5, Entry 30)
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H. E.; Duijverman, P.; Kiebom, A. P. G.; van Bekkum, H.
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1H NMR (300 MHz, DMSO-d6): d = 13.20 (br s, 1 H), 8.72 (m, 1 H,
ArH), 8.07–7.97 (m, 2 H, ArH), 7.66–7.61 (m, 1 H, ArH).
Acknowledgment
This work was supported by the Korea Science and Engineering
Foundation (KOSEF) (M20702010001-09N0201-00110) and
Ministry of Science & Technology (MOST), Republic of Korea,
through its National Nuclear Technology Program. H. Ahn and
K. A. De Castro thank the Korean Ministry of Education through
BK21 project for Hanyang University graduate program for the fi-
nancial support.
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Synthesis 2010, No. 3, 477–485 © Thieme Stuttgart · New York