Microwave-Assisted One-Pot Synthesis of Dihydrocoumarins from Phenols and Cinnamoyl Chloride
作者:Yuan Ma、Zhen Zhang、Yufen Zhao
DOI:10.1055/s-2008-1042921
日期:——
A facile approach has been developed for the synthesis of dihydrocoumarin derivatives through the reaction of phenols and cinnamoyl chloride in the presence of ecofriendly solid-acid catalyst montmorillonite K-10 via a tandem esterification-Friedel-Crafts alkylation process under microwave irradiation. The catalyst could be easily recovered and recycled.
catalytic phenylation reaction of α,β‐unsaturated acylazoliums was developed. A combination of N‐heterocyclic carbene and potassium ion cooperatively catalyzed the cyclization of α,β‐unsaturated acylazoliums with phenolates, which are directly generated from α,β‐unsaturated phenolic esters. Mechanistic studies demonstrated that the potassium ion plays a vital role in this reaction.
Heat-sensitive recording materials comprising a colorless or light-colored dye precursor and a color developer capable of developing a color of the dye precursor, upon reaction with said dye precursor with heating, further contain as sensitizers specific styryl-containing compounds. By incorporating these specific sensitizers, the heat-sensitive recording materials provide excellent thermal response and high sensitivity.
Solid Composite Copper-Copper Chloride Assisted Alkylation of Naphthols Promoted by Microwave Irradiation
作者:R. Zadmard、K. Aghapoor、M. Bolourtchian、M. R. Saidi
DOI:10.1080/00397919808004511
日期:1998.12
Naphthyl ethers and naphthyl esters were synthesized in good yield by using mixture of copper metal powder and copper (II) chloride in conventional microwave oven in short time.