Mechanistic dichotomy in the solvent dependent access to <i>E vs. Z</i>-allylic amines <i>via</i> decarboxylative vinylation of amino acids
作者:Samir Manna、Shunta Kakumachi、Kanak Kanti Das、Youichi Tsuchiya、Chihaya Adachi、Santanu Panda
DOI:10.1039/d2sc02090d
日期:——
donor–acceptor based photocatalysts. The solvent-dependent access to E vs. Z-allylic amines was achieved via decarboxylative vinylation of amino acids with vinyl sulfones. Detailed experimental studies have been conducted to understand the role of the solvent in the reactivity and stereoselectivity of the vinylation reactions.
One-pot synthesis of sulfonyl dibenzosuberdiones <i>via</i> In(OTf)<sub>3</sub>-promoted double Friedel–Crafts reactions of oxygenated arylacetic acids with β-arylvinyl sulfones
作者:Meng-Yang Chang、Chun-Yi Lin
DOI:10.1039/d3ob00149k
日期:——
sulfonyl dibenzosuberdiones is developed via In(OTf)3-promoted tandem double Friedel–Crafts reactions of oxygenated arylacetic acids with β-arylvinyl sulfones. A plausible mechanism is proposed and discussed in detail. This protocol allows for highly effective sequential intermolecular Michael addition, intramolecular ring-closure and α-benzylic oxidation via the formation of two carbon–carbon single