Under a catalytic amount of PTSA in aqueous or alcoholic media, activated unsymmetrical arylalkynes 1 undergo regioselective water or alcohol addition to afford successfully carbonyl compounds 2 in good to excellent yields. This new environmentally metal-free procedure, which afforded only Markovnikov adducts, is characterized by the mildness of acidic conditions and the excellent regio- and chemoselectivity
在
水或醇介质中催化量的
PTSA 下,活化的不对称芳炔 1 经历区域选择性的
水或醇加成,以良好至极好的产率成功提供羰基化合物 2。这种新的无环境
金属程序仅提供马尔可夫尼科夫加合物,其特点是温和的酸性条件和出色的区域和
化学选择性。