Yb(OTf)<sub>3</sub>-CatalyzedOne-Pot Synthesis of Quinazolin-4(3<i>H</i>)-onesfrom Anthranilic Acid, Amines and Ortho Esters (or FormicAcid) in Solvent-Free Conditions
作者:Limin Wang、Jianjun Xia、Fang Qin、Changtao Qian、Jie Sun
DOI:10.1055/s-2003-39397
日期:——
An efficientsynthesis of an array of quinazolin-4(3 H)- ones from anthranilic acid, ortho esters (or formic acid) and amines using Yb(OTf)3 in one-pot undersolvent-freeconditions is de- scribed. Compared with the classical reactionconditions, this new synthetic method has the advantage of excellent yields (75-99%), shorter reaction time (few minutes) and reusability of the catalyst.