Electrochemical Thiolation and Borylation of Arylazo Sulfones with Thiols and B
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pin
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作者:Rongkang Wang、Fangming Chen、Lvqi Jiang、Wenbin Yi
DOI:10.1002/adsc.202001518
日期:2021.3.29
arylazo sulfones were used as radical precursors for carbon‐heteroatom bond formation under electrochemical conditions. Moreover, the scalability of this approach was evaluated by performing the electrochemical thiolation and borylation of arylazo sulfones with thiols and B2pin2 on a gram scale. This protocol not only avoided the use of stoichiometric oxidants, metal catalysts, activating agents and
Coupling of thiols and aromatic halides promoted by diboron derived super electron donors
作者:Mario Franco、Emily L. Vargas、Mariola Tortosa、M. Belén Cid
DOI:10.1039/d1cc05294b
日期:——
We have proven that pyridine–boryl complexes can be used as superelectron donors to promote the coupling of thiols and aromatic halides through a SRN1 mechanism. The reaction is efficient for a broad substrate scope, tolerating heterocycles including pyridines, enolizable or reducible functional groups. The method has been applied to intermediates in drug synthesis as well as interesting functionalized
我们已经证明,吡啶-硼基复合物可用作超电子供体,通过 S RN 1 机制促进硫醇和芳族卤化物的偶联。该反应适用于广泛的底物范围,可耐受杂环,包括吡啶、可烯醇化或可还原的官能团。该方法已通过受控和连续的分子内电子转移过程应用于药物合成中的中间体以及有趣的功能化聚硫醚。
CS Coupling Using a Mixed‐Ligand Pd Catalyst: A Highly Effective Strategy for Synthesizing Arylthio‐Substituted Heterocycles
CScoupling: A variety of arylthio‐substitutedheterocycles can be prepared through CScoupling of the corresponding halide‐substitutedheterocycles by using a mixed‐ligand palladium catalyst, [Pd2(dba)3]/ Xantphos/CyPF‐tBu (see scheme; dba=dibenzylideneacetone). This catalytic system is extremely powerful and efficient, allowing even CCl bond activation.
Diaryl and Heteroaryl Sulfides: Synthesis via Sulfenyl Chlorides and Evaluation as Selective Anti-Breast-Cancer Agents
作者:Ivelina M. Yonova、Charlotte A. Osborne、Naomi S. Morrissette、Elizabeth R. Jarvo
DOI:10.1021/jo402586v
日期:2014.3.7
A mild protocol for the synthesis of diaryl and heteroaryl sulfides is described. In a one-pot procedure, thiols are converted to sulfenylchlorides and reacted with arylzinc reagents. This method tolerates functional groups including aryl fluorides and chlorides, ketones, as well as N-heterocycles including pyrimidines, imidazoles, tetrazoles, and oxadiazoles. Two compounds synthesized by this method
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.