Quaternization of pyridine, 2-, 3-, or 4-picoline with (Z)-, or (E)-5-nitro-2-furylvinyl bromide is described and the addition-elimination mechanism of the nucleophilic substitution to yield the respective (Z)-, or (E)-vinylammonium salts is discussed.
对
吡啶、2-、3-或4-
哌啶进行四元化反应,使用(
Z)-或(
E)-5-硝基-2-
呋喃基
乙烯基溴进行反应,并讨论亲核取代的加成-消除机理,以产生相应的(
Z)-或(
E)-
乙烯基铵盐。