Expedient synthesis of α-substituted fluoroethenes
作者:Samir K. Mandal、Arun K. Ghosh、Rakesh Kumar、Barbara Zajc
DOI:10.1039/c2ob07031f
日期:——
mild and efficient synthesis of 1-aryl-1-fluoroethenes from benzothiazolyl (aryl)fluoromethyl sulfones and paraformaldehyde, under DBU- or Cs2CO3-mediated conditions at room temperature, is described. A comparable diethyl fluoro(naphthalen-2-yl)methylphosphonate reagent does not react with paraformaldehyde under these mild conditions. The utility of the methodology for synthesis of terminal α-fluoroalkenes
描述了在室温下,在 DBU 或 Cs 2 CO 3介导的条件下,由苯并噻唑基(芳基)氟甲基砜和多聚甲醛温和有效地合成 1-芳基-1-氟乙烯。类似的氟(萘-2-基)甲基膦酸二乙酯试剂在这些温和条件下不会与多聚甲醛发生反应。还显示了该方法用于合成带有吸电子官能团的末端 α-氟代烯烃的实用性。
Julia Olefination as a General Route to Phenyl (α-Fluoro)vinyl Sulfones
作者:Barbara Zajc、Maggie He、Arun Ghosh
DOI:10.1055/s-2008-1072513
日期:——
Mild and efficient synthesis of phenyl (α-fluoro)vinylsulfones via condensation of aldehydes and a ketone with a novel benzothiazolyl based bis-sulfone reagent is reported and this proceeds with moderate to good Z-stereoselectivity.
据报道,通过醛和酮与新型苯并噻唑基双砜试剂的缩合反应温和有效地合成苯基(α-氟)乙烯基砜,并且具有中等至良好的 Z 立体选择性。