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Iodine catalyzed one-pot reactions of salicylaldehyde and dimolecular 1H-indene-1,3(2H)-dione, barbituric acids, 4-hydroxycoumarin, or 4-hydroxy-6-methylpyran-2-one were performed and provided a rapid, convenient and general approach to synthesize the chromene derivatives. 2-(11-Oxo-10,11-dihydroindeno[1,2-b]chromen-10-yl)-1H-indene-1,3(2H)-diones P1–P4 and 10-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-3-methylpyrano[4,3-b]chromen-1(10H)-ones...
A series of ethyl 6-alkoxy-7-phenyl-4-hydroxy-3-quinolinecarboxylates were designed and synthesized. Their structures were confirmed by 1 H NMR, 13 C NMR, IR and HRMS. The biological activities were primarily evaluated against Eimeria tenella according to Anticoccidial Index (ACI) method in vivo. The results showed that compounds 5e, 5f and 5i exhibited anticoccidial activities against...
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