this paper, aryldiazo sulfones are prepared from tandem sulfonylation/dehydrogenation reactions of arylhydrazines and sulfonyl chlorides. The transformations proceed well in the presence of catalytic CuSO4·5H2O, leading to aryldiazo sulfones in good to excellent yields. It is believed that this protocol represents a safe and convenient model for the synthesis of these versatile aryldiazo sulfones under
Catalytic reaction of arylazo arylsulfone with olefins in the presence of tetrakis(triphenylphosphine)palladium(0) was investigated. Arylation of olefins was the major product, and 1:1 adduct of arylazo and arenesulfonyl group to olefins was obtained as minor product. Diarylpalladium(II) species was proposed as an intermediate in this reaction.
研究了在四(三苯基膦)钯 (0) 存在下芳基偶氮芳基砜与烯烃的催化反应。烯烃的芳基化是主要产物,芳基偶氮和芳烃磺酰基与烯烃的 1:1 加合物作为次要产物得到。二芳基钯 (II) 物种被提议作为该反应的中间体。
ESR parameters of 5,5-dimethylpyrrolidine 1-oxide (DMPO) spin adducts in the photochemical decomposition of azo compounds
Splitting constants and g values are reported for 5,5‐dimethylpyrrolidine 1‐oxide spin adducts with radicals such as substituted‐Ph˙, NaSO3˙, PhS2˙, and others observed in the photochemicaldecomposition of azocompounds in various solvents.
报告了 5,5-二甲基吡咯烷 1-氧化物自旋加合物的分裂常数和 g 值,该加合物具有取代的 Ph·、NaSO3·、PhS2· 等自由基,这些自由基在偶氮化合物在各种溶剂中的光化学分解中观察到。
The Reaction of Arylazo Aryl Sulfones with Carbon Monoxide and Nucleophiles Catalyzed by the Palladium(0) Complex
The reaction of arylazo aryl sulfone (1) with carbonmonoxide in the presence of the palladium(0) catalyst affords substituted benzoic acid in a good yield, together with minor yields of diaryl ketone and biaryl. The reactions of 1 with carbonmonoxide and such nucleophiles as alcohols and amines under similar conditions give esters and amides, respectively.
Reaction of
Tricyclo[4.1.0.02,7]heptane with
1-(Arenesulfonyl)-2-phenyldiazenes
作者:S. G. Kostryukov、Yu. Yu. Masterova
DOI:10.1134/s107042802004003x
日期:2020.4
AbstractTricyclo[4.1.0.02,7]heptane reacted with 1-(arenesulfonyl)-2-phenyldiazenes by radical mechanism to give bicyclo[3.1.1]heptane derivatives. Unlike analogous reactions with alkenes, the addition of diazenes occurs readily without a catalyst and yields mainly arylazosulfonation products at the C1–C7 bond of tricyclo-[4.1.0.02,7]heptane. The addition products are capable of undergoing thermal