Reaction of Arynes with Vinylogous Amides: Nucleophilic Addition to the <i>ortho</i>-Quinodimethide Intermediate
作者:Ran Li、Xuemei Wang、Zhibin Wei、Chunrui Wu、Feng Shi
DOI:10.1021/ol4018968
日期:2013.9.6
The reaction of arynes with vinylogous amides containing no free N-H bonds proceeds in a [2 + 2] cycloaddition fashion at ambient temperature. The electronic properties of the vinylogous amides allow for the cycloadducts undergoing a facile ring-opening process, leading to electronically biased ortho-quinodimethide intermediates. Subsequent nucleophilic addition with alcohols affords 2-substituted benzaldehydes or ketones.
Arynes Double Bond Insertion/Nucleophilic Addition with Vinylogous Amides and Carbodiimides
作者:Ran Li、Huarong Tang、Haixing Fu、Hailong Ren、Xuemei Wang、Chunrui Wu、Chao Wu、Feng Shi
DOI:10.1021/jo402754d
日期:2014.2.7
some C═X double bonds, leading to benzannulated four-membered rings. The strain of these rings allow for a ready, spontaneous opening to afford o-quinomethide analogues. Subsequent nucleophilicaddition re-aromatizes the intermediates to achieve ortho-difunctionalization of arynes. In this report, we describe the aryne insertion into the C═C double bonds of vinylogous amides and the C═N double bonds of