p-Toluenesulfonic acid-promoted selective functionalization of unsymmetrical arylalkynes: a regioselective access to various arylketones and heterocycles
作者:Maud Jacubert、Olivier Provot、Jean-François Peyrat、Abdallah Hamze、Jean-Daniel Brion、Mouâd Alami
DOI:10.1016/j.tet.2010.03.055
日期:2010.5
Regioselective hydration of a wide range of internal alkynes has been afforded in high to good yields by using PTSA in EtOH. The scope of the reaction of alkynes has been delineated. Arylaliphatic alkynes and diarylalkynes were regioselectively hydrated in good to excellent yields and short reaction times when the reaction was achieved under microwave irradiation. Moreover, diarylalkynes, arylenynes
通过在EtOH中使用PTSA,可以实现高产率到良好产率的多种内部炔烃的区域选择性水合。已经描述了炔烃的反应范围。当在微波辐射下完成反应时,芳基脂族炔烃和二芳基炔烃以良好至优异的产率和短的反应时间进行区域选择性水合。而且,对在邻位带有甲氧基或硫代甲基取代基的二芳基炔,芳炔和二芳基二炔进行区域选择性5-内酯化。-dig-环化得到各种2-芳基-和2-苯乙烯基苯并呋喃或苯并噻吩衍生物。我们相信,这种新的无金属污染的环保方法与微波辐射相结合,对于绿色实验室规模的合成研究将非常重要。