Buchta,E.; Andree,F., Justus Liebigs Annalen der Chemie, 1961, vol. 640, p. 29 - 37
作者:Buchta,E.、Andree,F.
DOI:——
日期:——
Features of the reaction of 4-bromobut-2-enylphosphonium salts with monosubstituted hydrazines
作者:M. Zh. Ovakimyan、G. Ts. Gasparyan、M. R. Grigoryan、A. S. Bichakhchyan
DOI:10.1134/s1070363214030141
日期:2014.3
(4-Bromobut-2-en-1-yl)triphenylphosphonium bromide reacted with phenylhydrazine at 2A degrees C in the presence of sodium carbonate to form triphenyl[4-(2-phenylhydrazinylidene)but-2-en-1-yl]phosphonium bromide in 62% yield. The obtained N-phenylhydrazine derivatives cyclized into the corresponding pyrazoline derivatives of phosphonium salts. Unlike phenylhydrazine, ethylhydrazine reacted with (4-bromobut-2-ene-1-yl)triphenylphosphonium bromide under the same conditions to afford triphenyl[(1-ethyl-4,5-dihydro-1Hpyrazol-3-yl)methyl]- and -[(1-ethyl-1H-pyrazol-3-yl)methyl]phosphonium bromides in yields of 60 and 40%.
Stereoselective synthesis of E,Z-1,3-dienes via tandem nucleophile addition to a dienylphosphonium salt followed by wittig reaction
作者:James D. White、Mark S. Jensen
DOI:10.1016/s0040-4039(00)92314-1
日期:1992.1
1,3-Dienes of E,Z configuration were synthesized by addition of nucleophilic anions to butadienyltriphenylphosphonium bromide followed by in situ Wittigreaction of the derived E allylic phosphorane to an aldehyde.