HFIP-mediated strategy towards β-oxo amides and subsequent Friedel-Craft type cyclization to 2‑quinolinones using recyclable catalyst
作者:Arup K. Kabi、Raghuram Gujjarappa、Nagaraju Vodnala、Dhananjaya Kaldhi、Ujjawal Tyagi、Kalisadhan Mukherjee、Chandi C. Malakar
DOI:10.1016/j.tetlet.2020.152535
日期:2020.11
A simple and cost-effective 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP)-mediated protocol for the synthesis of β-oxo amides has been described by using amines and β-keto esters as substrates. The reaction conditions were found to be highly efficient towards the cleavage of CO bond and consequent formation of the products in excellent yields and selectivity. The obtained β-oxo amides were further transformed