The first metal-free procedure for the synthesis of arylsulfonyl fluorides is reported. Under organo-photoredox conditions, aryl diazonium salts react with a readily available SO2 source (DABSO) to afford the desired product through simple nucleophilic fluorination. The reaction tolerates the presence of both electron-rich and -poor aryls and demonstrated a broad functional group tolerance. To shed
报道了合成芳基磺酰氟的第一个无金属程序。在有机光氧化还原条件下,芳基重氮盐与容易获得的 SO 2源 (DABSO)反应,通过简单的亲核氟化得到所需的产物。该反应耐受富电子和贫电子芳基的存在,并表现出广泛的官能团耐受性。为了阐明反应机理,结合了几种实验技术,包括荧光、核磁共振和 EPR 光谱以及 DFT 计算。
Substituent effects on ESR parameters of α-phenyl-N-tert-butylnitrone spin adducts. Resolution enhancement and mass spectrometry
作者:Kai Pan、Chiou-Rong Lin、Tong-Ing Ho
DOI:10.1002/mrc.1260310705
日期:1993.7
The combination of high‐performance liquid chromatography (HPLC) and ESR spectrometry was used to isolate the free radicals produced by the reaction of a Grignard reagent with 15 substituted α‐Phenyl‐N‐tert‐butylnitrone. Long‐range hyperfine splitting constants (hfsc) were obtained by the resolution enhancement method. Linear correlation studies between hfsc and Hammett σp constants are reported. Dual‐parameter