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See, also:
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See, also:. Jung J.H., Kim Y.W., Kim M.A., Choi S.Y., Chung Y.K., Kim T.-R., Shin S., and Lee E. Org. Lett. 9 (2007) 3225
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Lee, E.8
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38
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61349171660
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The yield was not optimized yet. The reaction was accompanied by decomposition
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The yield was not optimized yet. The reaction was accompanied by decomposition.
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39
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0000136219
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For several examples of the synthesis of cyclic ethers via intramolecular herero-Michael reaction, see:
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For several examples of the synthesis of cyclic ethers via intramolecular herero-Michael reaction, see:. Nicolaou K.C., Hwang C.-K., and Duggan M.E. J. Am. Chem. Soc. 111 (1989) 6682
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0030876792
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Betancort J.M., Martín V.S., Pardón J.M., Palazón J.M., Ramirez M.A., and Soler M.A. J. Org. Chem. 62 (1997) 4570
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Ramirez, M.A.5
Soler, M.A.6
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46
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61349171037
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16a
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16a
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47
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61349134546
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Data for 17: IR (neat) 2926, 2855, 1749, 1455, 1373, 1218, 1097, 1057, 867, 742, 700, 602, 508 cm-1, 1H NMR (600 MHz, CDCl3) δ 7.53-7.28 (m, 8H, 7.21-7.19 (m, 2H, 5.56 (ddd, J, 7.9, 4.9, 2.6 Hz, 1H, 5.16 (d, J, 2.6 Hz, 1H, 4.62 (d, J, 12.5 Hz, 1H, 4.55 (d, J, 11.3 Hz, 2H, 4.49 (br dd, J, 4.2, 3.8 Hz, 1H, 4.40 (d, J, 11.3 Hz, 1H, 3.82 (dd, J, 9.3, 4.2 Hz, 1H, 3.75 (dd, J, 13.2, 11.0 Hz, 1H, 3.73 (s, 3H, 3.66 (dd, J, 11.0, 4.5 Hz, 1H, 3.56 (ddd, J, 11.3, 10.2, 4.4 Hz, 1H, 3.51 (ddd, J= 11.0, 10.3, 4.3 Hz, 1H, 3.41 (m, 1H, 3.32 (ddd, J= 9.6, 9.3, 2.5 Hz, 1H, 3.28 (dd, J, 9.1, 4.2 Hz, 1H, 3.16 (ddd, J= 11.0, 9.1, 4.2 Hz, 1H, 3.12 (ddd, J= 11.3, 9.1, 4.0 Hz, 1H, 2.57 (ddd, J, 11.3, 4.4, 4.0 Hz, 1H, 2.46 (ddd, J, 11.0, 4.3, 4.0 Hz, 1H, 2.19 (s, 3H, 2.06 (ddd, J, 14.3, 7.9, 2.5 Hz, 1H, 2.04 (s, 3H, 1.70 (ddd, J= 14.3, 9.6, 4.9 Hz, 1H, 1.64 (ddd, J= 11.3, 11.3, 11.3 Hz, 1H, 1.53 (s, 3H, 1.44 ddd, J, 11.0, 11.0
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+) 735.2987, found 735.2958.
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48
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9 The present synthesis of the GHI-ring, including the construction of 1,2-diol side chain, was efficiently accomplished in 25 steps from 2-deoxy-D-ribose.
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9 The present synthesis of the GHI-ring, including the construction of 1,2-diol side chain, was efficiently accomplished in 25 steps from 2-deoxy-D-ribose.
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