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3-(Pyrazol-5'-yl)coumarin (3) was prepared from condensation of 3-(2'-formyl-1'-chlorovinyl)-coumarin (1) with hydrazine hydrate at room temperature, followed by cyclization with base. Salicylaldazine was prepared from methoxylation of 1 to give acetal 7, followed by condensation of 7 with hydrazine hydrate at 80℃. Treatment of acetal 7 with thiourea yielded the corresponding 4-substituted-2-thioxo-2H-pyrimidine [ 3, 4-b]-coumarin (12). 相似文献
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Ahmed M. El‐Agrody Fathy A. Eid Hussein A. Emam Hany M. Mohamed Ahmed H. Bedair 《ChemInform》2002,33(38):123-123
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The chemical behaviours of 3-[1′-chloro-3′-(2″-phenyl-1″,3″-oxasol-5″-one-4″-ylidene)-propen-1′-yl]coumarin towards nucleophilic reagents (such as hydrolysis, aminolysis, hydroxyl-aminolysis, methanolysis and hydrazinolysis) were described. 相似文献
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