本文中,通过芳基稠合的1,6-二炔-3-酮的位点选择性分子内环化,已经证明了一种容易的以多样性为导向的方法来接近官能化的苯并[ a ]芴,苯并[ b ]芴酮和萘基酮。分别使用TfOH和AgBF 4分别通过原位形成的缩醛选择性地完成了苯并[ a ]芴和萘基酮的合成。芳基稠合的1,6-二炔-3-酮经历三氟甲磺酸-介导的分子内环化,从而导致苯并[ b ]芴酮衍生物通过EPR研究支持的基本中间体。还通过紫外可见光谱分析对这些转变进行了动力学研究,以阐明反应概况。
Synthesis of Naphthalene Derivatives from<i>ortho</i>-Alkynylacetophenone Derivatives via Tandem<i>in Situ</i>Incorporation of Acetal and Intramolecular Heteroalkyne Metathesis/Annulation
作者:Seetharaman Manojveer、Rengarajan Balamurugan
DOI:10.1021/ol5003835
日期:2014.3.21
An interesting domino reaction for the synthesis of substituted naphthyl ketones has been developed using readily accessible starting materials. This domino reaction proceeds via in situ incorporation of an acetal followed by intramolecular heteroalkyne metathesis/annulation in an ortho-alkynylacetophenone derivative. A deuterium incorporation experiment has been carried out to understand the mechanism