One‐Step Annulative π‐Extension of Alkynes with Dibenzosiloles or Dibenzogermoles by Palladium/
<i>o</i>
‐chloranil Catalysis
作者:Kyohei Ozaki、Keiichiro Murai、Wataru Matsuoka、Katsuaki Kawasumi、Hideto Ito、Kenichiro Itami
DOI:10.1002/anie.201610374
日期:2017.1.24
report an efficient one‐step annulative π‐extension reaction of alkynes that provides access to diarylphenanthrenes and related nanographene precursors. In the presence of a cationic palladium/o‐chloranil catalyst system and dibenzosiloles or dibenzogermoles as π‐extending agents, a variety of diarylacetylenes are transformed successfully into 9,10‐diarylphenanthrenes in a single step with good functional‐group
在材料科学中,可靠而短的合成多环芳烃和纳米石墨烯的合成路线很重要。在本文中,我们报告了炔烃的高效一步式环扩反应,可接触二芳基菲和相关的纳米石墨烯前体。在阳离子钯/ o存在下氯苯胺催化剂体系和二苯甲酚或二苯并germoles作为π扩展剂,各种二芳基乙炔可在一个步骤中成功转化为具有良好官能团耐受性的9,10-二芳基菲。此外,还证明了1,4-双(苯基乙炔基)苯与二苯基-1,3-丁二炔的π延伸反应,提供了低聚亚芳基产物,这些产物在合成较大的多环芳烃和纳米石墨烯方面具有潜力。