DDQ catalyzed oxidative lactonization of indole-3-butyric acids
作者:Christos Nixarlidis、John D. Chisholm
DOI:10.1039/d4ra05265j
日期:——
carbocations formed in this manner are trapped by a pendant carboxylic acid to form a lactone. Indole-3-butyric acids are especially good substrates for the reaction. The lactonization functions well with catalytic amounts of DDQ combined with MnO2 as the stoichiometric oxidant. This cyclization proceeds with a number of indole-3-butyric acids, and yields were generally good as long as the indole was electron