A metal-free and cost-effective synthetic protocol for the trifluoromethylation of N,N-disubstituted hydrazones with Langlois’s reagent (CF3SO2Na) to afford the corresponding functionalized trifluoromethyl ketone hydrazones has been established. It is proposed that a radical/SET mechanism proceeding via a trifluoroalkyl radical may be involved in the reaction. Applications of the methodology in industry
已经建立了一种无金属且具有成本效益的合成方案,用于使用Langlois试剂(CF 3 SO 2 Na)对N,N-二取代进行三氟甲基化,以提供相应的官能化三氟甲基酮。建议通过三氟烷基自由基进行的自由基/ SET机理可能参与该反应。我们将发现该方法在工业中的应用,并将继续在我们的实验室中开发使用Langlois试剂进行三氟甲基化的新方法。
Electrochemical C–H Sulfonylation of Hydrazones
作者:Biswajit Sarkar、Payel Ghosh、Alakananda Hajra
DOI:10.1021/acs.orglett.3c00999
日期:2023.5.19
We have developed an electrochemical method for the direct C–H sulfonylation of aldehyde hydrazones using sodium sufinates as the sulfonylating agent under supporting electrolyte-free conditions. This straightforward sulfonylation strategy afforded a library of (E)-sufonylated hydrazones with high tolerance of various functional groups. The radical pathway of this reaction has been revealed by the
我们开发了一种电化学方法,用于在无支持电解质条件下使用亚磺酸钠作为磺酰化剂对醛腙进行直接 C-H 磺酰化。这种直接的磺酰化策略提供了一个对各种官能团具有高耐受性的 ( E )-磺酰化腙库。机理研究揭示了该反应的激进途径。