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- W2743999968 abstract "Aprotocol for the synthesis of some 4-Aryl-1,3,4,6,7,8-hexahydroquinazolin-2,5(1H,6H)-diones(HHQs) was developed by means of a three-component condensation reaction of anaromatic aldehyde, 1,3-cylohexadione and urea in the presence of K3AlF6 (Al2O3/KF) as catalyst. This reaction is carried outunder different conditions including 1) solvent free; 2) reflux in acetonitrile; 3) reflux in ethanol; 4) reflux in chloroform; and 5) reflux in water. In allconditions, the desired products are obtained in high yields after relativelyshort reaction times. Nevertheless, the reactions proceed faster and in higheryields when they were carried out in acetonitrile. This adopted protocol forsome Biginelli-type products has offered theadvantages of reusability of the catalyst, high yields and ease of separationof pure products. Furthermore, the catalyst is easily prepared, stabilized andefficiently used under reaction conditions." @default.
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- W2743999968 date "2017-01-01" @default.
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- W2743999968 title "Synthesis of Some Hexahydroquinazolinones Using K<sub>3</sub>AlF<sub>6</sub>(Al<sub>2</sub>O<sub>3</sub>/KF) as an Efficient Catalyst in Some Hexahydroquinazolinone Derivatives" @default.
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- W2743999968 doi "https://doi.org/10.4236/ijoc.2017.73018" @default.
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