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Volumn , Issue 2, 2007, Pages 268-272

Transition metals in organic synthesis, part 82.1 First total synthesis of methyl 6-methoxycarbazole-3-carboxylate, glycomaurrol, the anti-TB active micromeline, and the furo[2,3-c]carbazole alkaloid eustifoline-D

Author keywords

Alkaloids; Antibiotics; Catalysis; Nickel; Palladium

Indexed keywords

ALKALOID DERIVATIVE; CARBAZOLE DERIVATIVE; EUSTIFOLINE D; GLYCOMAURROL; GLYCOZOLININE; METHYL 6 METHOXYCARBAZOLE 3 CARBOXYLIC ACID; MICROMELINE; PALLADIUM; TRANSITION ELEMENT; UNCLASSIFIED DRUG;

EID: 33847015242     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2007-967984     Document Type: Article
Times cited : (96)

References (64)
  • 1
    • 33747876110 scopus 로고    scopus 로고
    • Part 81: Krahl, M. P.; Jäger, A.; Krause, T.; Knölker, H.-J. Org. Biomol. Chem. 2006, 4, 3215.
    • Part 81: Krahl, M. P.; Jäger, A.; Krause, T.; Knölker, H.-J. Org. Biomol. Chem. 2006, 4, 3215.
  • 3
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    • Cordell, G. A, Ed, Academic Press: New York
    • (b) Chakraborty, D. P. In The Alkaloids, Vol. 44; Cordell, G. A., Ed.; Academic Press: New York, 1993, 257.
    • (1993) The Alkaloids , vol.44 , pp. 257
    • Chakraborty, D.P.1
  • 6
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    • (a) Pindur, U. Chimia 1990, 44, 406.
    • (1990) Chimia , vol.44 , pp. 406
    • Pindur, U.1
  • 50
    • 0142227985 scopus 로고    scopus 로고
    • The preparation of compound 10 using a Pd(0)-catalyzed amination has been reported previously, albeit in lower yield (77%): Urgaonkar, S.; Xu, J.-H.; Verkade, J. G. J. Org. Chem. 2003, 68, 8416.
    • The preparation of compound 10 using a Pd(0)-catalyzed amination has been reported previously, albeit in lower yield (77%): Urgaonkar, S.; Xu, J.-H.; Verkade, J. G. J. Org. Chem. 2003, 68, 8416.
  • 57
    • 33847062794 scopus 로고    scopus 로고
    • Pure glycomaurrol (5) was obtained by preparative HPLC on a Vydac C8 50 mm column (gradient elution with 50 mL/min MeCN-H2O, 30-60% MeCN in 30 min, Glycomaurrol (5, colorless crystals; mp 141°C. UV (MeOH, λmax, 257, 269, 292 (sh, 301, 350, 362 (sh) nm. IR (ATR, v, 3409, 3214, 2917, 1589, 1512, 1499, 1476, 1442, 1390, 1349, 1309, 1282, 1267, 1225, 1166, 1148, 1100, 1069, 1030, 954, 871, 850, 797, 739, 694, 648 cm-1. 1H NMR (500 MHz, acetone-d6, δ, 1.72 (d, J, 1.2 Hz, 3 H, 1.98 (s, 3 H, 2.51 (s, 3 H, 4.01 (d, J, 6.5 Hz, 2 H, 5.37 (t, J, 6.5 Hz, 1 H, 7.03 (d, J, 8.5 Hz, 1 H, 7.19 (d, J, 8.5 Hz, 1 H, 7.20 (m, 1 H, 7.37 (d, J, 8.2 Hz, 1 H, 7.70 (s, 1 H, 7.95 (s, 1 H, 9.94 (br s, 1 H, 13C NMR and DEPT (125 MHz, acetone-d6, δ, 18.34 (CH3, 21.67 (CH3, 25.83 CH3
    • +]: 265.1467; found: 265.1454.
  • 58
    • 33847050137 scopus 로고    scopus 로고
    • Crystal data for the bromocarbazole 12: C14H 10BrNO2, M, 304.14, monoclinic, space group: P21/c, a, 19.570(4, b, 8.296(2, c, 7.360(2) Å, β= 94.77(3)°, V, 1190.8(5) Å3, Z, 4, Dc, 1.696 g cm -3, μ, 3.444 mm-1, T, 198(2) K, λ, 0.71073 Å, θ range: 3.13-30.00°, 29544 reflections collected, 3454 independent (Rint, 0.0629, 168 parameters. The structure was solved by direct methods and refined by full-matrix least-squares on F2; final R indices [I > 2σI, R1, 0.0405, wR2, 0.0761; maximal residual electron density: 0.598 e Å-3. CCDC-628163 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallo
    • -3. CCDC-628163 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/ data_request/cif.
  • 59
    • 33847031645 scopus 로고    scopus 로고
    • Pure micromeline (6) was obtained by preparative HPLC on a Vydac C8 50 mm column (gradient elution with 50 mL/min MeCN-H2O, 30-60% MeCN in 30 min, Micromeline (6, colorless crystals; mp 205-206°C. UV (MeOH, λmax, 231, 252, 276 (sh, 278, 281, 295 (sh, 300, 340 nm. IR (ATR, v, 3156, 2963, 2911, 2854, 2740, 1663, 1649, 1629, 1603, 1566, 1522, 1464, 1446, 1371, 1310, 1291, 1271, 1228, 1202, 1181, 1164, 1120, 1063, 1028, 958, 899, 883, 851, 811, 792, 717, 663 cm-1. 1H NMR (500 MHz, acetone-d6, δ, 1.72 (d, J, 1.1 Hz, 3 H, 2.03 (s, 3 H, 4.07 (d, J, 6.4 Hz, 2 H, 5.36 (t, J, 6.4 Hz, 1 H, 7.15 (d, J, 8.5 Hz, 1 H, 7.33 (d, J, 8.5 Hz, 1 H, 7.63 (d, J, 8.5 Hz, 1 H, 7.95 (dd, J, 8.5, 1.4 Hz, 1 H, 8.03 (br s, 1 H, 8.69 (s, 1 H, 10.09 (s, 1 H, 10.70
    • 2: C, 77.40; H, 6.13; N, 5.01. Found: C, 77.50; H, 6.22; N, 5.03.
  • 61
    • 33847029848 scopus 로고    scopus 로고
    • Amberlyst 15 from Fluka (art. 06423).
    • Amberlyst 15 from Fluka (art. 06423).
  • 62
    • 33847045082 scopus 로고    scopus 로고
    • A separation of the two isomers 7 and 15 was achieved by preparative HPLC on a Vydac C8 30 mm column (gradient elution with 40 mL/min MeCN-H2O, 30-46% MeCN in 32 min, Eustifoline-D (7, colorless crystals; mp 156°C. UV (MeOH, λmax, 253, 260 (sh, 268, 298, 310, 339, 354 nm. IR (ATR, v, 3406, 2919, 2856, 1615, 1575, 1484, 1443, 1432, 1409, 1360, 1300, 1275, 1242, 1229, 1209, 1139, 1074, 1051, 946, 886, 875, 800, 789, 780, 750, 731, 690, 659 cm-1. 1H NMR (500 MHz, CDCl3, δ, 2.59 (s, 3 H, 7.26 (dd, J, 8.3, 1.2 Hz, 1 H, 7.31 (d, J, 8.8 Hz, 1 H, 7.33 (dd, J, 2.0, 0.4 Hz, 1 H, 7.36 (d, J, 8.3 Hz, 1 H, 7.58 (d, J, 8.8 Hz, 1 H, 7.81 (d, J, 2.0 Hz, 1 H, 7.98 (s, 1 H, 8.03 (br s, 1 H, 13C NMR and DEPT (125 MHz, CDCl3, δ, 21.51 (CH3, 105.40 (CH, 107.38 (CH, 109.43 (CH, 110.43 (CH, 114.80 C, 120
    • 11NO: C, 81.43; H, 5.01; N, 6.33. Found: C, 80.59; H, 5.06; N, 6.15.


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