Direct Synthesis of γ‐Keto Sulfones from Allylic Alcohols: One‐Pot Palladium(II)‐Catalyzed Generation of Enones Followed by Water‐Mediated 1,4‐Addition of Organosulfinates
作者:Mari Vellakkaran、Murugaiah M. S. Andappan、Kommu Nagaiah、Jagadeesh Babu Nanubolu
DOI:10.1002/ejoc.201600494
日期:2016.7
which indicated a chemoselective catalytic system for the preparation of halogen-bearing γ-keto sulfones. This one-pot method does not require an acid, a base, or isolation of any intermediate. Control experiments indicated that the active catalyst of the first step also promoted the subsequent C–S bond-formation reaction. Water was found to accelerate the reaction rate and to be involved in the protonolysis
Generation and reaction of alkyl radicals in open reaction vessels
作者:Elene Tatunashvili、Christopher S. P. McErlean
DOI:10.1039/d0ob01892a
日期:——
alkyl iodides into reactive alkyl radicals is described. Aryl diazonium salts react with Hantzsch esters and molecular oxygen to give aryl radicals, which participate in halogen atom transfers to give alkyl radicals. These intermediates react with a variety of acceptors. The reaction cascade occurs at room temperature, in open reaction vessels, with short reaction times.
Generation and reaction of alanyl radicals in open flasks
作者:Elene Tatunashvili、Callan J. Maloney、Bun Chan、Christopher S. P. McErlean
DOI:10.1039/d2cc06211a
日期:——
The generation and Giese-type reaction of alanyl radicals under metal-free reaction conditions is described. The procedure is operationally simple, occurring at ambient temperature in an open reaction vessel, and requiring short reaction times (≤5 min). The reaction occurs without epimerization and provides ready access to non-proteinogenic amino acids and peptides. Importantly, the process is tolerant