Imidazolium and pyridinium salts – solvents influencing the rate and direction of the Fries, Beckmann, and Claisen rearrangements
作者:S. Katkevica、A. Zicmanis、P. Mekss
DOI:10.1007/s10593-010-0487-0
日期:2010.6
The Fries, Beckmann, and Claisenrearrangements have been investigated in ionic liquid media. The effect of the structural elements of the latter on the direction of these rearrangements and the product yields has been studied.
Dihydrobenzofuran production from catalytic tandem Claisen rearrangement–intramolecular hydroaryloxylation of allyl phenyl ethers in subcritical water
作者:Ligang Luo、Chunze Liu、Zhiqiang Hou、Yuanyuan Wang、Liyi Dai
DOI:10.1039/c4ra04689g
日期:——
mild method for the preparation of dihydrobenzofurans through hydrothermal catalytic tandem Claisen rearrangement–intramolecular hydroaryloxylation of allyl phenylethers. This reaction provides a new method for constructing dihydrobenzofurans, a process that is potentially applicable to natural product synthesis. SBA-15, TS-1, HZSM-5 were chosen as catalysts in a hydrothermal reaction medium between 200