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Stereoselective allylic reduction via one-pot palladium-catalyzed allylic sulfonation and sulfinyl retro-ene reactions

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A tandem approach for the stereoselective allylic reduction has been developed based on a strategy combining the palladium-catalyzed S-allylation and the sulfinyl retro-ene reactions. In a one-pot process employing various… Click to show full abstract

A tandem approach for the stereoselective allylic reduction has been developed based on a strategy combining the palladium-catalyzed S-allylation and the sulfinyl retro-ene reactions. In a one-pot process employing various allylic carbonates, sodium t-butyldimethylsilyloxymethanesulfinate (TBSOMS-Na), easily prepared from the commercially available reagent Rongalite™, serves as a potent nucleophile to engage in the Tsuji–Trost S-allylation reaction generating allylic sulfone products. Subsequently, in situ deprotection of the TBSOMS group reveals allylic sulfinic acids which undergo stereospecific reductive transposition via sulfur dioxide extrusion to provide alkene products.

Keywords: retro ene; allylic reduction; ene reactions; sulfinyl retro; palladium catalyzed; stereoselective allylic

Journal Title: Organic chemistry frontiers
Year Published: 2018

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