Carboxyl radical-assisted 1,5-aryl migration through Smiles rearrangement
作者:Asik Hossian、Ranjan Jana
DOI:10.1039/c6ob01758d
日期:——
We report herein, a silver(I)-catalyzed Smiles rearrangement of 2-aryloxy- or 2-(arylthio)benzoic acids to provide aryl-2-hydroxybenzoate or aryl-2-mercaptobenzoate dimer, respectively, through 1,5-aryl migration from oxygen or sulfur to carboxylate oxygen. Mechanistically, the aryl ether moiety undergoes an intramolecular ipso attack by the carboxyl radical followed by a C–O or C–S bond cleavage.
Benzoic acid ester compounds, compositions, uses and methods related thereto
申请人:FERRER INTERNACIONAL, S.A.
公开号:EP1707558A1
公开(公告)日:2006-10-04
Benzoic acid ester compounds of formula (I):
wherein R and R1-R5 are as defined in the description, methods for producing them and use thereof in cosmetic, pharmaceutical, personal care and industrial preparations as sunscreens based on photochemical precursor properties of ultraviolet absorbers.
Synthesis of salicylates from anionically activated aromatic trifluoromethyl group
作者:Huilin Xie、Chuankai Lin、Ruixiang Wang、Jin-Biao Liu
DOI:10.1016/j.tetlet.2021.153592
日期:2022.1
An efficient approach to salicylates via a novel transformation of anionically activated aromatic trifluoromethylgroup is described. Anionically activated trifluoromethylgroup can react with phenols/alcohols under alkaline conditions to afford aryl/alkyl salicylates in high yields. Mechanism studies indicate that the carbonyl oxygen atom of ester is from the H2O in the solvent.
Benzoic Acid Ester Compounds, Compositions, Uses and Methods Related Thereto
申请人:Miralles Ricardo
公开号:US20080206158A1
公开(公告)日:2008-08-28
Benzoic acid ester compounds of formula (I):
wherein R and R
1
-R
5
have the meanings explained in the description, methods for producing them and use thereof in cosmetic, pharmaceutical, personal care and industrial preparations as sunscreens based on photochemical precursor properties of ultraviolet absorbers.