One Step of Palladium Catalyzed Benzodioxane Ring C—O Bond Formation, Synthesis of Isoamericanol A and Isoamericanin A.

ChemInform ◽  
2004 ◽  
Vol 35 (38) ◽  
Author(s):  
Xiaobi Jing ◽  
Yaocheng Shi ◽  
Yonghong Liu ◽  
Ying Han ◽  
Chaoguo Yan ◽  
...  
2004 ◽  
Vol 34 (9) ◽  
pp. 1723-1727 ◽  
Author(s):  
Xiaobi Jing ◽  
Yaocheng Shi ◽  
Yonghong Liu ◽  
Ying Han ◽  
Chaoguo Yan ◽  
...  

2020 ◽  
Author(s):  
Baojian Xiong ◽  
Yue Li ◽  
Yin Wei ◽  
Søren Kramer ◽  
Zhong Lian

Cross-coupling between substrates that can be easily derived from phenols is highly attractive due to the abundance and low cost of phenols. Here, we report a dual nickel/palladium-catalyzed reductive cross-coupling between aryl tosylates and aryl triflates; both substrates can be accessed in just one step from readily available phenols. The reaction has a broad functional group tolerance and substrate scope (>60 examples). Furthermore, it displays low sensitivity to steric effects demonstrated by the synthesis of a 2,2’disubstituted biaryl and a fully substituted aryl product. The widespread presence of phenols in natural products and pharmaceuticals allow for straightforward late-stage functionalization, illustrated with examples such as Ezetimibe and tyrosine. NMR spectroscopy and DFT calculations indicate that the nickel catalyst is responsible for activating the aryl triflate, while the palladium catalyst preferentially reacts with the aryl tosylate.


2021 ◽  
Author(s):  
K. R. Holman ◽  
A. M. Stanko ◽  
S. E. Reisman

This tutorial review highlights the use of palladium-catalyzed cascade cyclizations in natural product synthesis, focusing on cascades that construct multiple rings and form both C–C and C–X (X = O, N) bonds in a single synthetic operation.


Synthesis ◽  
2005 ◽  
Vol 2005 (17) ◽  
pp. 2881-2886 ◽  
Author(s):  
Egle M. Beccalli ◽  
Giorgio Abbiati ◽  
Gianluigi Broggini ◽  
Giuseppe Paladino ◽  
Elisabetta Rossi

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