(CF<sub>3</sub>CO)<sub>2</sub>O/K<sub>2</sub>CO<sub>3</sub>‐Mediated Synthesis of 3‐Sulfonylchromones through Cyclocondensation of β‐Ketosulfones and Carboxylic Acids
作者:Meng‐Yang Chang、Chun‐Yi Lin
DOI:10.1002/adsc.202300207
日期:2023.5.12
high-pressure (using a sealed tube) and dry-nitrogen atmospheric conditions. This study proposed and discussed a plausible mechanism. The paper also described the formation of 3-sulfonylflavones and gram-scale synthesis of 3-sulfonylchromones. Various combinations of anhydrides and bases-promoted reaction conditions were investigated for the (4+2) annulation via one carbon-oxygen (C−O) bond and one carbon-carbon