Eco-Friendly Synthesis of Novel Lariat Ethers via Mannich Reaction under Solventless Conditions
作者:Hashem Sharghi、Reza Khalifeh
DOI:10.3987/com-07-11044
日期:——
An expeditious solventless synthesis of novel lariat ethers using calcium oxide (CaO) via Mannich reaction are herein described. This methodology eliminates the use of excess of solvent during the course of reaction. The reaction time is brought down from hours to minutes (20-30 minutes) along with yield enhancement. The CaO powder can be reused up to three times after simple washing with acetone.
Reaction on a solid surface — A simple, economical, and efficient Mannich reaction of azacrown ethers over graphite
作者:Hashem Sharghi、Reza Khalifeh
DOI:10.1139/v08-026
日期:2008.5.1
Graphite brings about a rapid Mannichreaction with a range of activated and unactivated phenolic compounds such as p-cresol and p-nitrophenol. The reactions are carried out with azacrown ether and paraformaldehyde in solvent-free conditions at 100 °C for 20–30 min. The graphite powder can be reused up to three times after simple washing with acetone.Key words: azacrown ether, lariat ether, graphite