The first palladium‐catalyzed direct benzylic C(sp3)−H chalcogenation with diaryl disulfides and diphenyl diselenide has been established. The coupling reaction proceeds between the thioether radical and palladiumcycle intermediate. Picolinamide serves as an excellent directing group for the C−H activation of benzylic C(sp3)−H and can be easily removed. The current protocol exhibits a relatively
Hahn et al., Croatica Chemica Acta, 1957, vol. 29, p. 319,322
作者:Hahn et al.
DOI:——
日期:——
Facile and Effective Synthesis of N-Aryl-2-Furancarboxamides Derivatives Under the Condition of Phase Transfer Catalysis
作者:Tai-Bao Wei、You-Ming Zhang
DOI:10.1080/00397919908086466
日期:1999.9
A convenient one-pot procedure is reported for the preparation of N-aryl-2-furancarboxamide derivatives. 2-Furoic acid is activated by benzenesulfonyl chloride under the condition of solid-liquid phase transfer catalysis using solid potassium carbonate as base and polyethylene glycol-400-(PEG-400) as phase transfer catalyst.