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
Synthetic utility of Kabachnik–Fields reaction: a convenient one-pot three-component synthesis of N-phenyl isoquinolone-1-phosphonates
作者:Amulrao U. Borse、Nilesh L. Patil、Mahesh N. Patil、Raghao S. Mali
DOI:10.1016/j.tetlet.2012.10.030
日期:2012.12
A convenient, one-pot three-component synthesis of novel N-phenyl isoquinolone-1-phosphonates (4a–4g) using the Kabachnik–Fieldsreaction, starting from ethyl 2-(2-formyl-4,5-dimethoxyphenyl) acetate (1) and anilines (2a–2g) is described. The aldehyde (1) on reaction with substituted anilines (2a–2g) and triethyl phosphite in acetonitrile using trifluroacetic acid as catalyst provides N-phenyl iso
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.
Carbene-Catalyzed Activation of Formyl-phenylacetic Esters for Access to Chiral Dihydroisoquinolinones
作者:Shuquan Wu、Jun Xu、Rui Deng、Hongling Wang、Yonggui Robin Chi、Pengcheng Zheng