A modified Friedländer conversion of the cyclocondensation of aromatic o‐aminonitriles with carbonyl compounds was discovered. Systematic studies reveal that both the new transformation and the classic Friedländer annulation in the presence of ZnCl2 constitute a pair of divergent reaction, and thecontrolled PDF transformation of this divergent reaction was achieved in the present of bases.
Investigation of the Reaction of <i>o</i>-Aminonitriles with Ketones: A New Modification of Friedländer Reaction and Structures of Its Products
作者:Jiarong Li、Lijun Zhang、Daxin Shi、Qing Li、Dong Wang、Chunxia Wang、Qi Zhang、Ling Zhang、Yanqiu Fan
DOI:10.1055/s-2007-1000841
日期:2008.1
A new modification of the Friedlander reaction is described and the new byproduct obtained from the reaction of O-aminonitriles and ketones was found to be 2,3-dihydroquinazolin-4(1 H)-one. The mechanism probably involved the formation of an intermediate oxazine, via the Pinner reaction and its transformation into new products via the Dimroth rearrangement.
Metal modified SSA as a heterogeneous catalyst to promote the cyclocondesation of o-aminobenzonitriles with cycloketones in water
作者:Li Jun Zhang、Jian Ling Yu、Wei Li Wang、Heng Li、Dan Dan Xu、Ya Dong Bi、Fu De Liu
DOI:10.1016/j.tetlet.2013.12.001
日期:2014.1
A novel solid catalyst based on silica sulfuric acid (SSA) was prepared. When SSA was treated with Lewis acids, metal ions can be easily immobilized on silica surface, which results in strengthening Lewis acidity. The novel solid catalyst was demonstrated to be efficient in promoting the cyclocondesation of o-aminobenzonitriles with cycloketones in water, and hence promising in the application of pharmaceutical study and production. (C) 2013 Elsevier Ltd. All rights reserved.
Lessel Juergen, Arch. Pharm, 327 (1994) N 9, S 571-579