A simple and convenient method for synthesis of new aminonaphthoquinones derived from lawsone by catalytic multicomponent Mannich reaction
作者:Rodolfo G. Fiorot、João F. Allochio Filho、Thieres M.C. Pereira、Valdemar Lacerda、Reginaldo B. dos Santos、Wanderson Romão、Sandro J. Greco
DOI:10.1016/j.tetlet.2014.06.031
日期:2014.7
was developed for the synthesis of a series of new aminonaphthoquinones derivedfrom 2-hydroxy-1,4-naphthoquinone (lawsone) by three-component Mannich reaction using catalytic amount of p-TsOH in CH3CN, at room temperature. At the present work, we improved the yield and significantly reduced the reaction time for several Mannich reactions with different amine and aromatic aldehydes using a non-expensive