Pd/PTABS: Low-Temperature Thioetherification of Chloro(hetero)arenes
作者:Siva Sankar Murthy Bandaru、Shatrughn Bhilare、Jesvita Cardozo、Nicolas Chrysochos、Carola Schulzke、Yogesh S. Sanghvi、Krishna Chaitanya Gunturu、Anant R. Kapdi
DOI:10.1021/acs.joc.9b00840
日期:2019.7.19
Heteroarenes of commercial relevance such as purines and pyrimidines were also found to be useful substrates for the reported transformation. The commercial drug Imuran (azathioprine) was synthesized as an example, and its preparation could be optimized. DFT studies were performed to understand the electronic effects of the tested ligands on the catalytic reaction.
constrained binuclear palladium catalyst system affords selective thioetherification of a wide range of functionalized arenethiols with chloroheteroaromatic partners with the highest turnover numbers (TONs) reported to date and tolerates a large variety of reactive functions. The scope of this system includes the coupling of thiophenols with six‐ and five‐membered 2‐chloroheteroarenes (i.e., functionalized
Barbier type reaction with lithium metal has been tested under sonication on pyridines, a cinnoline and on various diazines. This very convenient method allows a very fast and smooth functionalization of these heterocycles.
Mild Room-Temperature Palladium-Catalyzed C3-Arylation of 2(1<i>H</i>)-Pyrazinones via a Desulfitative Kumada-Type Cross-Coupling Reaction
作者:Vaibhav P. Mehta、Sachin G. Modha、Erik Van der Eycken
DOI:10.1021/jo901327y
日期:2009.9.4
An efficient desulfitative Kumada-type cross-coupling protocol is reported for the C3-arylation of 5-chloro-3-(phenylsulfanyl)pyrazin-2(1H)-ones. The method has also been successfully extended to the arylation of some (hetero)aryl thioethers and thioesters.
Palladium-catalyzed Carbon–Sulfur Cross-coupling Reactions of Aryl Chlorides with Indium Tris(organothiolates)
作者:Juntae Mo、Dahan Eom、Sung Hong Kim、Phil Ho Lee
DOI:10.1246/cl.2011.980
日期:2011.9.5
Pd-Catalyzed carbon–sulfur cross-coupling reactions of aryl chlorides with indium tris(organothiolates) were developed. Aryl chlorides reacted with indium tris(organothiolates) (0.35 equiv) in the presence of 4 mol % of Pd(OAc)2, 4.2 mol % of Xantphos, and Cs2CO3 as an additive, producing aryl–aryl and aryl–alkyl sulfides in good to excellent yields.