Yield of benzothiazine derivatives and catalysis by heteropolyacids
作者:Alireza Samzadeh-Kermani
DOI:10.1080/17415993.2016.1187733
日期:2016.11.1
An efficient heteropolyacid-catalyzed reaction for the synthesis of benzothiazine derivatives is reported. In this transformation, H3PW12O40 was employed as a catalyst in a reaction involving 2-aminobenzenethiols, acetylenic esters, and malonate esters. Optimum conditions are developed in i-PrOH at 50˚C for 7 h. GRAPHICAL ABSTRACT