作者:Saman Damavandi、Reza Sandaroos
DOI:10.1080/15533174.2011.614313
日期:2012.5.1
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)
已经报道了一系列新的2-氨基-4,7-二氢-4-芳基吡喃并[2,3 - b ]吡咯-3-甲腈的合成。在[pmim] HSO 4 SiO2二氧化硅负载的离子液体(二氧化硅负载的1-甲基-3-二氧化硅)的存在下,通过2-羟基吡咯,丙二腈和各种芳族醛的一锅反应,进行酸催化的环缩合反应。(三乙氧基甲硅烷基丙基)咪唑硫酸氢盐)作为有效的催化剂。醛上取代基的电子性质极大地影响了反应效率。