Synthesis of Naphthalenes and 2-Naphthols by the Electrophilic Cyclization of Alkynes
作者:Xiaoxia Zhang、Sampa Sarkar、Richard C. Larock
DOI:10.1021/jo051948k
日期:2006.1.1
variety of substituted naphthalenes are readily prepared regioselectively under mild reaction conditions by the 6-endo-dig electrophilic cyclization of appropriate arene-containing propargylic alcohols by ICl, I2, Br2, NBS, and PhSeBr. 3-Iodo-2-naphthols have also been prepared in excellent yields by the cyclization of analogous 1-aryl-3-alkyn-2-ones. This methodology readily accommodates various functional
通过ICl、I 2、Br 2、NBS和PhSeBr对适当的含芳烃的炔丙醇进行6-内位亲电环化,可以在温和的反应条件下容易地区域选择性地制备多种取代的萘。通过类似的1-芳基-3-炔-2-酮的环化也可以以优异的产率制备3-碘-2-萘酚。该方法很容易适应各种官能团,并已成功扩展到取代咔唑和二苯并噻吩的合成。