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33
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61849104250
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note
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+ m/z = 519.
-
-
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34
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61849157603
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note
-
General procedure for the synthesis of gossypol Schiff bases (2-5) and gossypol hydrazones (6-9): To a solution of (1) (500 mg, 0.96 mmol) in dichloromethane (30 mL) the respective amines or hydrazines in dichloromethane (40 mL) were added (1.92 mmol). The mixture was first stirred at 35° C for 5 h and then solvent was evaporated to the 40 mL of total volume. Next the mixture was cooled to the room temperature and subsequently the 10 mL of methanol was added. The products were precipitated, filtered off and dried under reduced pressure. Crude precipitates were recrystallised from 1:1 dichloromethane-ethanol mixture. Gossypol aza-derivatives were obtained as orange or orange-brown solids (Yield from 82% to 91%).
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-
-
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35
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61849181143
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note
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10: C, 68.63; H, 8.01, N, 3.48. Found: C, 68.60; H, 8.00, N, 3.45. Other gossypol Schiff bases (2, 3, 5-9) were characterized by us in Refs. 8a,e-g,18,21a.
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-
-
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36
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61849151527
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note
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12: C, 62.99; H, 7.45; N, 6.68. Found: C, 62.96; H, 7.41; N, 6.65. Other gossypol hydrazones (10, 11, 13-15) were characterized by us in Refs. 8a,h.
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37
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52349097603
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Przybylski P., Kira J., Schroeder G., Brzezinski B., and Bartl F. J. Phys. Chem. A 112 (2008) 8061
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38
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61849130268
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note
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4 equal 1:1 molar ratio) for concentrations = 1, 0.5, 0.1 μg/mL. Four replicate plates were inoculated for each sample concentration and subsequently radial growth inhibition of fungi was measured two times. The data obtained were analyzed by a t-Student test using Statistica 8.0 (1984-2008 StatSoft. Inc., Tulsa, OK, USA) at significance level of α = 0.01.
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40
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61849117575
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Przybylski P., Pyta K., Ratajczak-Sitarz M., Katrusiak A., and Brzezinski B. Struc. Chem. 19 (2008) 124
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Przybylski, P.1
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41
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66249100914
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Przybylski, P.; Pyta, K.; Brzezinski, B.; Bartl, F. J. Mass Spectrom., in press. doi:10.1002/jms.1559.
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Przybylski, P.; Pyta, K.; Brzezinski, B.; Bartl, F. J. Mass Spectrom., in press. doi:10.1002/jms.1559.
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