Pd‐Catalyzed Annulation of 1‐Halo‐8‐arylnaphthalenes and Alkynes Leading to Heptagon‐Embedded Aromatic Systems
作者:Jianming Yan、Md. Shafiqur Rahman、Naohiko Yoshikai
DOI:10.1002/chem.201805746
日期:2019.7.17
A palladium‐catalyzed heptagon‐forming annulation reaction between 1‐halo‐8‐arylnaphthalene and diarylacetylene is reported. The reaction is promoted using a catalytic system comprised of Pd(OAc)2, moderately electron‐deficient triarylphosphine P(4‐ClC6H4)3, and Ag2CO3 to afford benzo[4,5]cyclohepta[1,2,3‐de]naphthalene derivatives in moderate to good yields, in preference to fluoranthene as a competing
据报道,1-卤代-8-芳基萘与二芳基乙炔之间存在钯催化的七边形环化反应。使用由Pd(OAc)2,中度缺电子的三芳基膦P(4-ClC 6 H 4)3和Ag 2 CO 3组成的催化体系促进反应,得到苯并[4,5]环庚[1,2 ,3-德在中度至良好的产率]萘衍生物,优先于荧蒽作为竞争副产物。也可以实现双重环化,以获取一种新型的嵌入七边形的多环芳烃化合物。