Synthesis of aza-Henry products and enamines in water by Michael addition of amines or thiols to activated unsaturated compounds
作者:Azim Ziyaei-Halimehjani、Mohammad R. Saidi
DOI:10.1016/j.tetlet.2007.12.042
日期:2008.2
Nitroamines and nitrothiols were synthesized in high yields by the Michael addition of amines and thiols to nitroolefins without using any catalyst. Also, the reaction of amines with dimethylacetylene dicarboxylate (DMAD) in water afforded the corresponding enamines.
Addition reactions of immonium benzotriazolates to acetylenic esters
作者:Alan R. Katritzky、Clara N. Fali、Daniela C. Oniciu
DOI:10.1016/0040-4020(94)00998-a
日期:1995.1
1-Dialkylaminomethylbenzotriazoles react with ethyl propiolate and dimethyl acetylenedicarboxylate by addition of the benzotriazole anion followed by the immonium cation. The benzotriazolyl group in the products undergoes facile nucleophilic displacement.
Solvent-Free Synthesis of Enamines from Alkyl Esters of Propiolic or But-2-yne Dicarboxylic Acid in a Ball Mill
作者:Achim Stolle、Rico Thorwirth
DOI:10.1055/s-0030-1261179
日期:2011.9
A solvent-free method for the addition of amines to dialkylacetylendicarboxylates or alkylpropiolates using a planetary ball mill was developed. Conversion of educts was quantitative within five minutes without use of any catalyst or base. Beside the E-/Z-isomers, no side products were formed. addition - amines - alkynes - enamines - green chemistry