Reactions of 2- and 4-pyrones with secondary phosphine chalcogenides: a facile synthesis of functional phosphorylated pyrones
摘要:
The oxidative cross-coupling between 4-hydroxy-6-methyl-2-pyrone or 3-hydroxy-2-methyl-4-pyrone and secondary phosphine chalcogenides proceeds in CCl4/Et3N under mild conditions (20-52 degrees C, 0.75-10 h) through the hydroxyl group to give 0-(6-methyl-2-oxo-2H-pyran-4-yl) diorganylphosphinochalcogenoates or 0-(2-methyl-4-oxo-4H-pyran-3-yl) diorganylphosphinochalcogenoates, in high yields. (C) 2013 Elsevier Ltd. All rights reserved.