Palladium Catalyzed Aryl(alkyl)thiolation of Unactivated Arenes
作者:Perumal Saravanan、Pazhamalai Anbarasan
DOI:10.1021/ol4036209
日期:2014.2.7
palladium-catalyzed aryl(alkyl)thiolation of various substituted unactivated arenes is accomplished for the synthesis of diverse unsymmetrical diaryl(alkyl) sulfides in good yield employing electrophilic sulfur reagent 6 derivedfrom succinimide. The developed strategy was coupled with intramolecular arylation of a C–H bond to afford dibenzothiphene derivatives, an important moiety in material science as organic
Iodine(III) Enabled Dehydrogenative Aryl C−S Coupling by in situ Generated Sulfenium Ion
作者:Khokan Choudhuri、Saikat Maiti、Prasenjit Mal
DOI:10.1002/adsc.201801510
日期:2019.3.5
Due to the normal polarity preferences, arenes form stable complexes with thiols through S−H⋅⋅⋅π interaction and direct dehydrogenative aryl C−S coupling is usually restricted. We report here an umpolung based one pot and direct C−S coupling approach under metal free and mild condition. Electrophile sulfenium ions were generated in situ from thiols using iodine(III) reagent PhI(OAc)2 (PIDA) and subsequently
Potassium Isopropoxide: For Sulfination It is the Only Base You Need!
作者:Mahmoud Sayah、Michael G. Organ
DOI:10.1002/chem.201303756
日期:2013.11.25
PEPPSI max: KOiPr has been identified as the key ingredient for Pd‐catalyzed sulfination (see scheme). Potassium is essential to keep the thiol concentration low, and isopropoxide is necessary for precatalyst activation and to break up Pd‐sufide‐based resting states. Together with the reactive Pd‐PEPPSI‐IPentCl o‐picoline catalyst, this system couples profoundly deactivated partners at RT that other
PEPPSI max:KO i Pr被确定为Pd催化硫化的关键成分(参见方案)。钾对于保持较低的硫醇浓度至关重要,而异丙醇对于激活前催化剂和破坏基于硫化钯的静止状态则必不可少。一起与反应性的Pd-PEPPSI-IPent氯 ø甲基吡啶催化剂,该系统耦合深刻在RT失活的合作伙伴,其它催化剂可以在回流的甲苯中未完成。
Carbon–Sulfur Bond Formation Catalyzed by [Pd(IPr*<sup>OMe</sup>)(cin)Cl] (cin = cinnamyl)
作者:Gulluzar Bastug、Steven P. Nolan
DOI:10.1021/jo401492n
日期:2013.9.20
The newly prepared complex [Pd(IPr*OMe)(cin)(Cl)] provides high catalytic activity for carbon–sulfur cross-coupling reactions. Nonactivated and deactivated aryl halides were successfully coupled with a large variety of aryl- and alkylthiols using this well-defined palladium N-heterocycliccarbene (NHC) complex.
Carbon-Sulfur Bond Formation of Challenging Substrates at Low Temperature by Using Pd-PEPPSI-IPent
作者:Mahmoud Sayah、Michael G. Organ
DOI:10.1002/chem.201102158
日期:2011.10.10
bromides and chlorides has been achieved under the most mild temperatures yet reported (i.e., room temperature to 40 °C). The bulk afforded by the di‐2,6‐(3‐propylphenyl)imidazolium‐derived Pd‐PEPPSI‐IPent catalyst is believed to actively promote the critical reductive elimination step of the catalytic cycle, thereby eliminating the formation of poisonous off‐cycle dimeric resting states that have plagued