作者:M. Zh. Ovakimyan、S. K. Barsegyan、A. S. Pogosyan、N. M. Kikoyan、G. A. Panosyan、M. G. Indzhikyan
DOI:10.1007/s11176-005-0111-7
日期:2004.12
Phosphonium salts with a 4-bromo-3-chlorobut-2-enyl or a 3-chlorobuta-1,3-dienyl group react with phenylhydrazine to give phenylhydrazones of corresponding 4-phospohonio-substituted 2-chloro-2-butenals. Reactions of phosphonium salts containing a 4-bromo-3-chlorobut-2-enyl group with a series of binucleophiles were studied. Under the action of urea, 1,4-dehydrobromination takes place to form a salt with a conjugated diene group, which undergoes partial 3,4-3,4-cyclization under the reaction conditions. Nucleophilic substitution reactions of [o-(bromomethyl)benzyl]triphenylphosphonium bromide with binucleophiles were also carried out.
含有 4-溴-3-氯丁烯-2-基团或 3-氯丁烯-1,3-二基团的鏻盐与苯肼反应,生成相应的 4-磷杂取代的 2-氯-2-丁烯醛的苯肼。研究了含有 4-溴-3-氯丁烯-2-基团的鏻盐与一系列双亲核物的反应。在脲的作用下,1,4-脱氢溴化反应生成带有共轭二烯基团的盐,在反应条件下,共轭二烯基团发生部分 3,4-3,4-环化反应。此外,还进行了[邻(溴甲基)苄基]三苯基溴化膦与双亲核物的亲核取代反应。