Novel Task-Specific Ionic Liquids as Solvents for Michael Addition of Methylene Active Compounds to Chalcones Without Any Catalyst
作者:An-Guo Ying、Xin-Zhi Chen、Cheng-Lin Wu、Ren-Hua Zheng、Hua-Ding Liang、Chang-Hua Ge
DOI:10.1080/00397911.2011.584260
日期:2012.12.1
Abstract A convenient and facile method for Michael addition of methyleneactivecompounds to chalcones has been developed by using 1,8-diazabicyclo [5.4.0]undec-7-ene- derived task-specific ionic liquids as reaction medium in the absence of any catalyst. This protocol could afford the Michael adducts in good to excellent yields in a short time, the workup is very simple, and the ionic liquid could
A facile and efficient synthesis of polysubstituted benzenes has been developed via sequential Michael addition, Knoevenagel condensation and nucleophilic cyclization reactions of readily available chalcones with active methylene compounds in guanidinium ionic liquids.
One-pot three component synthesis of 3,5-disubstituted 2,6-dicyanoaniline derivatives using 4-dimethylaminopyridine (DMAP) as a catalyst
作者:Suchandra Bhattacharjee、Abu T. Khan
DOI:10.1016/j.tetlet.2016.05.097
日期:2016.7
An efficient synthetic protocol was devised for the synthesis of 3,5-disubstituted 2,6-dicyanoaniline from malononitrile, aldehydes, and β-nitro-olefins by using N,N-dimethyl-4-aminopyridine (DMAP) as a nucleophilic catalyst. The important aspects of the present methodology are: use of non-toxic organo-catalyst, shorter reaction time, compatibility with wide range of substrates, and good yields.
SYNTHESIS OF HIGHLY SUBSTITUTED 1,6-NAPHTHYRIDINES: A REINVESTIGATION
作者:Eva Veverková、Marika Nosková、Štefan Toma
DOI:10.1081/scc-120006476
日期:2002.1
ABSTRACT A reinvestigation of the recently described method of synthesis of highly substituted 1,6-naphthyridines was carried out. It was found out that the reaction of chalcones with malononitrile catalysed by pyrrolidine afforded the mixture of four products both when thermal as well as microwave heating was used. The claimed[1] 1,6-naphthyridines formation were exceptions.