DABCO-catalyzed C–C bond formation reaction between electron-deficient alkynes and 1,3-dicarbonyl compounds
作者:Hua Cao、Haiping Zhong、Yuanguang Lin、Liuqing Yang
DOI:10.1016/j.tet.2012.03.047
日期:2012.5
excellent catalyst DABCO has been found to catalyze C–C bond formation reaction between activated methylenes and alkynes. The transformation has provided a facile route for the synthesis of 2H-pyran-2-ones or unsaturated alkenoicacidester derivatives and explored the new possibilities of N-catalysts for Michael addition of nucleophiles with alkynoates.
Reaction Between 1,3-Dicarbonyl-Containing CH Acids and Dialkyl Acetylenedicarboxylates in the Presence of Silica Gel in Solvent-Free Conditions: An Efficient Method for the Synthesis of Electron-Poor Alkenes and Pyranes
作者:Ali Ramazani、Nader Noshiranzadeh
DOI:10.1080/00397910802517830
日期:2009.3.10
Abstract A two-component condensation reactionbetween a 1,3-dicarbonyl-containing CH acid and an electron-poor acetylenicester efficiently provides fully substituted electron-poor alkenes and pyranes in a one-pot reaction in the presence of silica gel in solvent-free conditions.