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
Synthesis of sulfonyl 2-aryl-5-methylenyltetrahydropyrans
作者:Meng-Yang Chang、Kuan-Ting Chen
DOI:10.1039/d3ra06370d
日期:——
research describes a high-yield method for the synthesis of sulfonyl 2-aryl-5-methylenetetrahydropyrans by one-pot straightforward DABCO-promoted intramolecular Michael addition of β-sulfonyl styrene with 2-chloromethyl-1-propenol followed by intramolecularalkylation. This Baylis–Hillman-type pathway provides a highly effective stereoselective annulation by forming one carbon–oxygen bond and one carbon–carbon