Research Article
Catalytic Synthesis of Pyrano- and Furoquinolines Using Nano Silica Chromic Acid at Room Temperature
Table 2
Synthesis of furoquinolines using nano silica chromic acid (nano-SCA) catalyst in THF as solvent and at room temperature.
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Isolated yields. bIsomers were separated by column chromatography. bRatio of the product was determined from the crude 1H NMR spectra. |