Caffeine-H3PO4: a novel acidic catalyst for various one-pot multicomponent reactions
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DOI: 10.1007/s11164-017-3002-8
Abstract: Caffeine-H3PO4 along with caffeine-HClO4 and caffeine-HNO3 have been prepared and applied for one-pot preparation of bis(indolyl) methanes, 4,4′-(arylmethylene) bis(1H-pyrazol-5-ols), 3,3′-(arylmethylene) bis(4-hydroxycoumarins), 2,4,5-trisubstituted imidazoles, 1‐amidoalkyl‐2‐naphthols, and polyhydroquinolines. The catalysts were characterized using Fourier-transform infrared (FTIR) spectroscopy,… read more here.
Keywords: caffeine h3po4; acidic catalyst; spectroscopy; one pot ... See more keywords