Peculiarities of the Knott Aryliminomethylation Reaction of 7-Hydroxy-4-methylcoumarin: Formation of the 6-Substituted Regioisomer
摘要
Abstract
One-pot synthesis of azomethinocoumarins by the Knott reaction of 4-methyl-7-hydroxycoumarin with ethyl orthoformate and arylamines afforded 8-substituted product along with minor 6-substituted regioisomers in some cases.