Acetylenic carbanions add to nitroarenes: dinitrobenzenes, nitropyridines, etc to form [sigma]Hadducts that are subsequently oxidized by DDQ according to oxidative nucleophilic substitution of hydrogen (ONSH) pathway to give nitroaryl acetylenes.
乙炔碳负离子加到硝基
芳烃上:
二硝基苯,
硝基吡啶等,形成σHadduct,随后根据氢的氧化亲核取代(ONSH)途径,将
DDQ氧化成DDH,得到硝基芳基
乙炔。