Synthesis of β,β-Disubstituted Styrenes via Trimethylsilyl Trifluoromethanesulfonate-Promoted Aldehyde-Aldehyde Aldol Coupling-Elimination
作者:Grant J. Dixon、Michael R. Rodriguez、Tyler G. Chong、Kevin Y. Kim、C. Wade Downey
DOI:10.1021/acs.joc.2c01458
日期:2022.11.4
α-disubstituted aldehydes condense with electron-rich aromatic aldehydes to yield β,β-disubstituted styrenes. More electron-rich aromatic aldehydes react more rapidly and in higher yield. Preliminary results suggest that the reaction may proceed via the ionization and formal deformylation of an aldol intermediate.
在三甲基甲硅烷基三氟甲磺酸酯 (TMSOTf) 和 2,6-二甲基吡啶存在下,α,α-二取代醛与富电子芳香醛缩合生成 β,β-二取代苯乙烯。更多的富电子芳香醛反应更快,产率更高。初步结果表明,该反应可能通过醛醇中间体的离子化和形式去甲酰化进行。