نتایج جستجو برای: 4h chromenes
تعداد نتایج: 6923 فیلتر نتایج به سال:
A series of 2-amino-4-(nitroalkyl)-4H-chromene-3-carbonitriles were synthesized by an efficient multicomponent reaction in aqueous media using DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) as a catalyst at room temperature. Mild condition, environment friendly procedure and excellent yields are the main advantages of this procedure. The cytotoxic activity of target compounds were evaluated against t...
A synergetic effect of nanocatalyst and ultrasonic irradiation was examined for the synthesis 4H-chromenes from benzaldehyde, cyclohexanone, malononitrile. It observed this contributory improved reaction that used highly pure products in short times highest yields. The nanocomposite includes guanidine anchored on to magnetic NiFe2O4 nanoparticles were as active base sonication compounds. produc...
One-pot four-component synthesis of polyfunctionalized 1,4-dihydropyridine derivatives was developed by a condensation of aldehydes, malononitrile, diethylacetylenedicarboxylate and aniline in the presence of choline chloride/urea as a deep eutectic solvent (DES)at room temperature.Moreover, an efficient method was reported for the synthesis of highly substituted 4H-chromenes through one-...
A new and efficient synthesis of 2-amino-4H-chromene derivativeswhich have remarkable pharmacological properties is developed by one-pot three-component efficient reaction between aldehydes, malononitrile, and α or β-naphthol in MeOH as solvent using DABCO-CuCl complex as an effective catalyst at room temperature. The structures of synthesized compounds were characteriz...
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