Palladium-Catalyzed Formation of Aceanthrylenes:  A Simple Method for Peri-Cyclopentenelation of Aromatic Compounds

2001 ◽  
Vol 123 (2) ◽  
pp. 355-356 ◽  
Author(s):  
Hung Dang ◽  
Miguel A. Garcia-Garibay
2016 ◽  
Vol 358 (3) ◽  
pp. 375-379 ◽  
Author(s):  
Yongqin He ◽  
Zhaoyang Wu ◽  
Chaowei Ma ◽  
Xiaoqiang Zhou ◽  
Xingxing Liu ◽  
...  

1990 ◽  
Vol 385 (2) ◽  
pp. 297-306 ◽  
Author(s):  
Tetsuro Jintoku ◽  
Yuzo Fujiwara ◽  
Itaru Kawata ◽  
Tomio Kawauchi ◽  
Hiroshi Taniguchi

1983 ◽  
Vol 256 (2) ◽  
pp. C35-C36 ◽  
Author(s):  
Yuzo Fujiwara ◽  
Itaru Kawata ◽  
Hiroshi Sugimoto ◽  
Hiroshi Taniguchi

2018 ◽  
Vol 9 (38) ◽  
pp. 7556-7561 ◽  
Author(s):  
Hiroyuki Kitano ◽  
Wataru Matsuoka ◽  
Hideto Ito ◽  
Kenichiro Itami

A palladium-catalyzed one-step annulative π-extension (APEX) reaction of indoles and pyrroles that allows rapid access to nitrogen-containing polycyclic aromatic compounds is described.


2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Zhi-Tao He ◽  
John F. Hartwig

Abstract Small, strained rings have rigid, defined conformations and unique electronic properties. For these reasons, many groups seek to use these subunits to form biologically active molecules. We report a generally applicable approach to attach small rings to a wide range of aromatic compounds by palladium-catalyzed α-arylation of cyclopropyl, cyclobutyl and azetidinyl esters. The direct α-arylation of cyclopropyl esters and cyclobutyl esters is achieved in high yield by ensuring that the rate of coupling exceeds the rate of Claisen condensation. The α-arylation of azetidines is achieved without ring opening of the strained saturated heterocycle by conducting the reactions with an azetidine derivative bearing a benzyl protecting group on nitrogen. Mechanistic studies show that the α-arylation of small rings is challenging because of the weak acidity of α C-H bond (cyclopropanes), strong sensitivity of the strained esters to Claisen condensation (cyclobutatanes), or facile decomposition of the enolates (azetidinyl esters).


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