Journal
SYNTHESIS AND REACTIVITY IN INORGANIC METAL-ORGANIC AND NANO-METAL CHEMISTRY
Volume 42, Issue 5, Pages 621-627Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15533174.2011.614313
Keywords
2-amino-4,7-dihydro-4-arylpyrano[2,3-b]pyrrole-3-carbonitrile; hydrogensulfate ionic liquid; one-pot
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Synthesis of a new series of 2-amino-4,7-dihydro-4-arylpyrano[2,3-b]pyrrole-3-carbonitrile has been reported. The acid-catalyzed cyclocondensation synthesis proceeded by the one-pot reaction of 2-hydroxypyrrole, malononitrile, and various aromatic aldehydes in the presence of silica-supported ionic liquid of [pmim]HSO4 (SiO2) (silica-supported 1-methyl-3-(triethoxysilylpropyl)imidazolium hydrogensulfate) as an efficient catalyst. The electronic nature of the substitution attached to the aldehyde affected the reaction efficiency profoundly.
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