Xanthan sulfuric acid: A new and efficient biosupported solid acid catalyst for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones

摘要

Xanthan sulfuric acid (XSA) is employed as a recyclable catalyst for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones. These syntheses were performed via a one-pot, threecomponent condensation of aldehydes, amines, and urea/thiourea under solvent-free conditions.