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Volumn , Issue 20, 2007, Pages 3123-3126

One-pot synthesis of 2H-chromene derivatives from ortho-naphthoquinones

Author keywords

Chromenes; Naphthoquinones; One pot cyclisation; Wittig reaction

Indexed keywords

1,4 NAPHTHOQUINONE DERIVATIVE; 2H CHROMENE DERIVATIVE; CHLOROFORM; CHROMENE DERIVATIVE; HYDROGEN; PHOSPHONIUM DERIVATIVE; SODIUM HYDROXIDE; UNCLASSIFIED DRUG;

EID: 37749037155     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2007-990925     Document Type: Article
Times cited : (12)

References (49)
  • 28
    • 37749026513 scopus 로고    scopus 로고
    • Data was obtained at 120 K with Mo KGk-α radiation by means of the Enraf Nonius KappaCCD area detector diffractometer of the EPSRC crystallographic service, based at the University of Southampton. Data collection was carried out under the control of the program COLLECT17a and data reduction and unit cell refinement were achieved with the COLLECT17a and DENZO programs.17b Correction for absorption, by comparison of the intensities of equivalent reflections, was applied using the program SADABS.17c The program ORTEP-3 for Windows17d was used in the preparation of Figure 3 and SHELXL-9717e and PLATON17f in the calculation of molecular geometry. The structure was solved by direct methods using SHELXS-9717g and fully refined by means of the program SHELXL-97.17e In the final stages of refinement, hydrogen atoms were introduced in calculated positions and refined with a riding model
    • 17e In the final stages of refinement, hydrogen atoms were introduced in calculated positions and refined with a riding model.
  • 29
    • 0004281430 scopus 로고    scopus 로고
    • Nonius BV: Delft, The Netherlands
    • (a) Hooft, R. W. W. COLLECT; Nonius BV: Delft / The Netherlands, 1998.
    • (1998) COLLECT
    • Hooft, R.W.W.1
  • 31
    • 37749009472 scopus 로고    scopus 로고
    • Sheldrick, G. M. SADABS, Version 2.10, Bruker AXS Inc, Madison, Wisconsin, USA, 2003
    • (c) Sheldrick, G. M. SADABS, Version 2.10.; Bruker AXS Inc.: Madison / Wisconsin / USA, 2003.
  • 36
    • 37749051964 scopus 로고    scopus 로고
    • 3. CCDC deposition no: 292382.
    • 3. CCDC deposition no: 292382.
  • 49
    • 37749053555 scopus 로고    scopus 로고
    • General Procedure for 2H-Chromenes 7-10: A mixture of the naphthoquinone (0.02 mol, allyltriphenylphosphonium salt (0.04 mol, CHCl3 (15 mL) and aq 50% NaOH (15 mL, 0.19 mol) was vigorously stirred for 48 h at r.t. The organic phase was collected, washed with H 2O (3 x 10 mL, dried over MgSO4 and the solvent was evaporated. Purification of the crude product was achieved by flash column chromatography using hexane-CH2Cl2 as eluent. 6-Methoxy-3,3-dimethyl-3H-benzo[f]chromene (7a, IR (KBr, 2971, 2938, 1634, 1588, 1574, 1515, 1464, 1450, 1443, 1411, 1379, 1351, 1283, 1247, 1220, 1207, 1199, 1160, 1130, 1119, 1092, 996, 981, 885, 841, 755, 727, 694, 626 cm-1. 1H NMR (300 MHz, CDCl 3, δ, 1.50 (s, 6 H, Me, 3.98 (s, 3 H, OMe, 5.58 (d, J, 9.8 Hz, 1 H, H-2, 6.48 (s, 1 H, H-5, 6.95 (d, J, 9.8 Hz, 1 H, H-1, 7.30 ddd
    • 3): δ = 19.0 (Me), 26.4 (Me), 30.0 (C-3), 111.0 (C-1), 112.9 (C-5), 118.3 (C-2), 125.1 (C-8a), 126.0 (C-7), 128.0 (C-6), 144.9 (C-8), 146.7 (C-4a).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.