A series of novel N-methyl morpholine (Nmm) based ionic liquids with 1,2-propanediol group were synthesized and used as catalysts for Knoevenagel condensation at roomtemperature in water. Under the effect of the catalyst, various aldehydes or aliphatic ketones could react with a wide range of activated methylene compounds well, including malononitrile, alkyl cyanoacetate, cyanoacetamide, β-diketone
Indium Metal as a Reducing Agent. Selective Reduction of the Carbon−Carbon Double Bond in Highly Activated Conjugated Alkenes
作者:Brindaban C. Ranu、Jyotirmoy Dutta、Sankar K. Guchhait
DOI:10.1021/ol016296a
日期:2001.8.9
[reaction: see text] Indium metal in aqueous ethanolic ammonium chloride reduces the C=C bond in highly activated conjugated alkenes such as alpha,alpha-dicyano olefins, beta-arylenones, and enone esters.
Rearrangement of Pyran Derivatives Obtained from Vinyl Malononitriles and Aldehydes via Vinylogous Aldol Reaction: A Novel Facile Method for the Synthesis of Dienamides
A novel one-pot approach to a variety dienamides from vinyl malononitriles and aldehydes via vinylogous aldol reaction was achieved by the electrolytic ring opening of the initially formed pyran derivatives under mild basic catalysis with good diastereoselectivity.
A Simple Method for the Synthesis of Functionalised Chromenes via Vinylogous Michael Addition of α,α-Dicyanoalkenes on Iminocoumarin Derivatives
作者:Paramasivan Perumal、Thelagathoti Babu
DOI:10.1055/s-0030-1259509
日期:2011.2
A one-pot synthesis of 2-amino-4H-chromenes was achieved in good yields from three-component reaction of salicylaldehyde, malononitrile, and α,α-dicyanoalkenes catalysed by triethylamine.