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Compound 3f (irradiation at 80 W for 1 min and 30 s, mp 229-230 °C (dec, ethyl acetate, IR (KBr, 3100, 1715, 1595 cm-1; 1H NMR (CDCl3, DMSO-d6) δ 6.30 (d, 1H, J, 10.0 Hz, 6.91 (s, 1H, 7.52 (t, 1H, J, 8.2 Hz, 7.68 (t, 1H, J, 8.2 Hz, 8.21 (d, 1H, J, 8.2 Hz, 8.30 (d, 1H, J, 8.2 Hz, 8.48 (d, 1H, J, 10.0 Hz, 10.95 (s, 1H, exchanged by D2O, 13 C NMR (CDCl3, DMSO-d6) δ 97.9, 105.6, 109.3, 120.3, 121.9, 122.3, 123.9, 124.5, 127.7, 139.0, 146.2, 157.6, 160.6; MS (ESI, 235 [M+Na, Anal. Calcd for C13H8O3: C, 73.85; H, 3.80. Found: C, 73.46; H, 3.91.General procedure for the synthesis of 3f from ethyl propiolate. Ethyl propiolate (4, 442 mg, 0.46 ml, 4.5 mmol) and ZnCl2 (405 mg, 3 mmol) was added to a solution of naphthalene-1,3-diol (1f, 722 mg, 4.5 mmol) in dry dioxan (15 ml) and the mixture was refluxed under sti
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2 (405 mg, 3 mmol) was added to a solution of naphthalene-1,3-diol (1f) (722 mg, 4.5 mmol) in dry dioxan (15 ml) and the mixture was refluxed under stirring for 4 days. After cooling the mixture was poured in 5% HCl (15 ml), condensed to the half of the volume and left overnight in the refrigerator. The precipitated solid was recrystallised from ethyl acetate to give compound 3f (83% yield).
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59649112493
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Compound 3g (irradiation at 240 W for 30 s, mp 230-232 °C (ethyl acetate, IR (KBr, 3377, 1709, 1636 cm-1; 1H NMR (CDCl3, DMSO-d6) δ 6.56 (d, 1H, J, 10.0 Hz, 7.45 (s, 1H, 7.46-7.52 (m, 2H, 7.73 (d, 1H, J, 9.1 Hz, 8.18 (d, 1H, J, 9.1 Hz, 8.59 (d, 1H, J, 10.0 Hz, 10.04 (s, 1H, exchanged by D2O, 13C NMR (CDCl3, DMSO-d6) δ 113.6, 114.3, 120.4, 122.6, 124.1, 125.2, 126.0, 129.9, 136.4, 136.9, 138.9, 143.4, 159.2; MS ESI, 235 [M+Na, Anal. Calcd for C13H8O3: C, 73.85; H, 3.80. Found: C, 73.64; H, 3.90
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3: C, 73.85; H, 3.80. Found: C, 73.64; H, 3.90.
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59649085016
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3: C, 72.20; H, 5.60. Found: C, 72.44; H, 5.87.
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3: C, 72.20; H, 5.60. Found: C, 72.44; H, 5.87.
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59649091606
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Compound 3i: mp 250-252 °C (ethyl acetate, IR (Nujol, 3150, 1725, 1655, 1590 cm-1; 1H NMR (CDCl3, DMSO-d6) δ 6.47 (d, 1H, J, 9.1 Hz, 6.87 (s, 1H, 7.58-7.68 (m, 2H, 7.79 (d, 1H, J, 9.1 Hz, 8.28 (d, 1H, J, 8.2 Hz, 8.43 (d, 1H, J, 8.2 Hz, 9.83 (s, 1H, exchanged by D2O, 13C NMR (CDCl3, DMSO-d6) δ 103.0, 111.6, 115.1, 121.0, 122.1, 123.1, 124.2, 126.4, 126.6, 126.8, 143.8, 159.4, 160.5; MS ESI, 235 [M+Na, Anal. Calcd for C13H8O3: C, 73.85; H, 3.80. Found: C, 73.98; H, 3.63
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3: C, 73.85; H, 3.80. Found: C, 73.98; H, 3.63.
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0036122940
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Cerqueira N.M.F.S.A., Oliveira-Campos A.M.F., Coelho P.J., De Carvalho L.H.M., Samat A., and Cuglielmetti R. Helv. Chim. Acta 85 (2002) 442
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Cerqueira, N.M.F.S.A.1
Oliveira-Campos, A.M.F.2
Coelho, P.J.3
De Carvalho, L.H.M.4
Samat, A.5
Cuglielmetti, R.6
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0020360931
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Kaufman K.D., Erb D.J., Blok T.M., Carlson R.W., Knoechel D.J., McBride L., and Zeitlow T. J. Heterocycl. Chem. 19 (1982) 1051
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59649107883
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Biobyte Corp, Claremont, CA 91711, USA, C-QSAR program
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Biobyte Corp. 201 West 4th Street, Suite 204, Claremont, CA 91711, USA, C-QSAR program.
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201 West 4th Street, Suite 204
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