A facile and efficient visible-light-driven method has been developed to construct sulfoxides via oxidative coupling of aryldiazo sulfones with thiolsusing the O2 in air as the oxidant. This reaction could be performed at room temperature under catalyst- and additive-free conditions. The present methodology offers a mild and environmentally benign approach to obtain a library of sulfoxides in good
Palladium-Catalyzed Sulfinylation of Aryl- and Alkenylborons with Sulfinate Esters
作者:Minori Suzuki、Kazuya Kanemoto、Yu Nakamura、Takamitsu Hosoya、Suguru Yoshida
DOI:10.1021/acs.orglett.1c01292
日期:2021.5.7
An efficient, direct sulfinylation of organoborons catalyzed by palladium is disclosed. Treatment of organoborons and sulfinate esters in the presence of a palladium precatalyst provided a broad range of sulfoxides. Various organosulfur compounds having oxidizable functional groups were successfully prepared through the sulfoxide synthesis.
[EN] COMPLEXES, PROCESSES FOR THEIR PREPARATION AND THEIR USE<br/>[FR] COMPLEXES, LEURS PROCEDES DE PREPARATION ET LEUR UTILISATION
申请人:UNIVERSITY COLLEGE DUBLIN
公开号:WO1996024601A1
公开(公告)日:1996-08-15
(EN) The present invention relates to a transition metal cationic chiral non-racemic complex containing a substituted or unsubstituted tetradentate or quinquedentatate ligand derived from two salicylaldimine units, the cationic complex including a non-nucleophilic anion NNA and, optionally, an oxygen atom bonded to the transition metal and, optionally, a neutral donor ligand D capable of coordinative bonding to the transition metal, the cationic chiral complex and the cationic chiral oxo-complex having structural formulae (I and II), respectively. The complex of formula (II) is useful for stereoselectively epoxidising an alkene and for stereoselectively oxidising a tertiary amine, an organic sulphide or a racemic tertiary phosphine.(FR) Complexe non racémique chiral cationique de métal de transition renfermant un ligand tétradenté ou quinquédenté substitué ou non et dérivé de deux motifs salicylaldimine. Ledit complexe cationique comprend un anion non nucléophile (NNA) et éventuellement un atome d'oxygène lié au métal de transition, et éventuellement un ligand donneur neutre (D) apte à se lier par coordination au métal de transition. Le complexe chiral cationique et l'oxo-complexe chiral cationique répondent respectivement aux formules développées (I) et (II). Le complexe de la formule (II) est utilisable dans l'époxydation stéréosélective d'un alcène et dans celle d'une amine tertiaire, d'un sulfure organique ou d'une phosphine tertiaire racémique.
Visible-Light-Driven Silver-Catalyzed One-Pot Approach: A Selective Synthesis of Diaryl Sulfoxides and Diaryl Sulfones
作者:Dong Hyuk Kim、Juyoung Lee、Anna Lee
DOI:10.1021/acs.orglett.7b03901
日期:2018.2.2
An efficient one-pot approach for the synthesis of diaryl sulfoxides and diaryl sulfonesusing aryl thiols and aryl diazonium salts was developed. The use of a visible-light-driven silver catalysis and the subsequent singlet-oxygen-induced oxidation enabled selective synthesis of sulfoxides and sulfones in the absence of a photocatalyst. The reactions were carried out under mild reaction conditions;