Hypervalent Iodine in Synthesis 56: A Convenient Route for the Synthesis of Thiol Esters via Palladium-Catalysed Alkylthiocarbonylation or Arylthiocarbonylation of Diaryliodonium Salts

Hypervalent iodine in synthesis 87: The synthesis of 2,5-diaryl-2H-tetrazoles

In the presence of cuprous iodide and potassium carbonate, N-arylation of 5-aryl-2H-tetrazole with a diaryliodonium salt proceeds smoothly in DMF at room temperature to give 2, 5-diaryl-2H-tetrazoles in moderate to good yield.

Palladium-catalyzed carbonylation reactions of aryl halides and related compounds

Palladium-catalyzed carbonylation reactions of aromatic halides in the presence of various nucleophiles have undergone rapid development since the pioneering work of Heck and co-workers in 1974, such that nowadays a plethora of palladium catalysts are available for different carbonylative transformations. The carboxylic acid derivatives, aldehydes, and ketones prepared in this way are important intermediates in the manufacture of dyes, pharmaceuticals, agrochemicals, and other industrial products. In this Review, the recent academic developments in this area and the first industrial processes are summarized.