Direct Trideuteromethylation of Sulfenate Anions Generated In Situ from β-Sulfinyl Esters: An Access to Trideuteromethyl Sulfoxides

Reductive Deuteration of Aldehydes/Ketones for the Synthesis of Monodeuterated Phosphinates and Derivatives Using D2O as the Nucleophilic Deuterium Source

The ideal deuteration, for organic synthetic chemists, might include the use of a cheap deuterium source, mild operating conditions, and diverse transformations. We developed an umpolung sequence for the reductive deuteration of aldehydes/ketones, affording synthetically useful monodeuterated phosphinates. The further one-pot transformation and plausible mechanism of this reaction were studied.

Trideuteromethylthiolation through Reaction of Arynes, S-Methyl-d3 Sulfonothioate with Sulfonamides or Amides: Access to Trideuteromethylated Sulfilimines

A direct and practical three-component tandem reaction of arynes, S-methyl-d3 sulfonothioate with sulfonamides or amides is developed. The reaction is highly efficient and chemoselective, which allows mild synthesis of trideuteromethylated sulfilimines with broad substrate scope and good functional group compatibility, giving the products in good to excellent yields with 92%-99% deuterium incorporation. Mechanism studies disclosed sulfenamide that generated in situ is the key intermediate for the reaction. This protocol provides potential method for introduction of -SCD3 moiety for deuteration of marked drugs and drug candidates containing sulfilimine skeleton.

Generation of sulfones utilizing β-sulfinyl esters as masked aryl sulfinates under redox-neutral conditions

A method for generation of SVI sulfones from β-sulfinyl esters (SIV) under transition-metal-free non-oxidative mild conditions is presented. Various sulfones have been achieved with moderate to excellent yields. The advantage of using β-sulfinyl esters as masked aryl sulfinates has also been exemplified using brominated substrates. Oxygen isotope-labeling experiments indicated that the oxygen atoms incorporated into the sulfone product come from the sulfoxide of the β-sulfinyl ester. Successive β-elimination/O-addition/sulfinate esterification/β-elimination processes are proposed for the mechanism of generating SVI from SIV.