Copper-catalyzed N–H insertion reactions from sulfoxonium ylides
作者:Lucas G. Furniel、Antonio C.B. Burtoloso
DOI:10.1016/j.tet.2020.131313
日期:2020.12
The first use of copper(II) as an efficient catalyst for N–H insertionreactions between anilines and α-carbonyl sulfoxoniumylides is described. Products, 39 arylglycine derivatives, were obtained in yields up to 97% employing a simple and fast experimental procedure.
Direct Access to 1,1-Dicarbonyl Sulfoxonium Ylides from Aryl Halides or Triflates: Palladium-Catalyzed Carbonylation
作者:Yang Yuan、Xiao-Feng Wu
DOI:10.1021/acs.orglett.9b01926
日期:2019.7.5
The synthesis of 1,1-dicarbonyl sulfoxonium ylides by palladium-catalyzed carbonylation of aryl halides or triflates with α-carbonyl sulfoxonium ylides has been developed for the first time. This method provides a general approach to synthetically useful 1,1-dicarbonyl sulfoxonium ylides in high efficiency. The protocol displays a wide substrate scope, showing that the resulting 1,1-dicarbonyl sulfoxonium
Palladium-Catalyzed Synthesis of Bis-Substituted Sulfoxonium Ylides
作者:Christopher Janot、Pierre Palamini、Benjamin C. Dobson、James Muir、Christophe Aïssa
DOI:10.1021/acs.orglett.8b03744
日期:2019.1.4
The lack of general access to bis-substituted sulfoxonium ylides is addressed by developing a palladium-catalyzed C–H cross-coupling of α-ester sulfoxonium ylides with (hetero)aryl iodides, bromides, and triflates. Three different catalysts have been evaluated. This method is amenable to the late-stage functionalization of active pharmaceutical ingredients.
chemodivergent reaction between stabilised sulfur ylides and salicylaldehydes, leading to the (suprising) formation of 2H-chromenes or dihydrobenzofurans products. Particular attention was set on the unusual mechanisms involved. Two unique reaction routes including two ylide units in the reactions are proposed. These pathways were validated by performing a selectivity switch in some cases, enabled
Coupling of Sulfoxonium Ylides with Arynes: A Direct Synthesis of Pro-Chiral Aryl Ketosulfoxonium Ylides and Its Application in the Preparation of α-Aryl Ketones
作者:Alexánder Garay Talero、Bruna Simões Martins、Antonio C. B. Burtoloso
DOI:10.1021/acs.orglett.8b03126
日期:2018.11.16
A general, mild, and versatile synthesis of the challenging α-aryl-β-ketosulfoxonium ylides has been developed for the first time, substituting traditional methods starting from diazo compounds. The arylation of easily accessible β-ketosulfoxonium ylides using aryne chemistry allowed the preparation of a large scope of the pro-chiral ylides in very good yields (40 examples; up to 85%). As applications