Reaction of 2,3-Dihalopropionic Acids and Their Derivatives with P- and N-Nucleophiles
作者:R. Dzh. Khachikyan、N. V. Tovmasyan、M. G. Indzhikyan
DOI:10.1007/s11176-006-0009-z
日期:2005.12
3-(Triphenylphosphoniochlorido)acrylic and 2,3-dichloropropionic acids react with triphenylphosphine to form 1,2-bis(triphenylphosphoniochlorido)ethane. Under analogous conditions, 2,3-dibromopropionic acid undergoes debromination followed by triphenylphosphine addition to give, after water treatment, 3-(triphenylphosphoniobromido)propionic acid. 2,3-Dihalopropionitriles react similarly, providing 3-(triphenylphosphoniohalido) propionitriles. The reaction of 2,3-dibromopropionamide with triphenylphosphine was performed to show that E-(triphenylphosphoniobromido)acrylic acid is capable, by contrast to what was reported previously, of reacting with triphenylphosphine. Pyridine forms with 2,3-dihalopropionic acids vinylpyridinium halides, while the reactions with aliphatic amines gives rise to dehydrohalogenation products.
3-(三苯基膦亚氯)丙烯酸和 2,3-二氯丙酸与三苯基膦反应生成 1,2-双(三苯基膦亚氯)乙烷。在类似条件下,2,3-二溴丙酸发生脱溴反应,然后加入三苯基膦,经水处理后生成 3-(三苯基膦溴化)丙酸。2,3-二卤代丙腈发生类似反应,生成 3-(三苯基膦卤代)丙腈。2,3-二溴丙酰胺与三苯基膦的反应表明,E-(三苯基膦溴)丙烯酸能够与三苯基膦发生反应,这与之前的报道不同。吡啶与 2,3-二氢丙酸形成乙烯基吡啶鎓卤化物,而与脂肪族胺反应则产生脱氢卤化产物。