Darstellung von trans‐4‐Diphenylphosphinyl‐stilbenen
作者： D. Gloyna , L. Alder , H.-G. Henning , H. Köppel , M. Siegmund
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摘要: Synthesis of trans-4-Diphenylphosphinyl Stilbenes The reaction 4-tolyl-diphenylphosphine oxide with N-bromosuccinimide results in 4-diphenylphosphinyl benzylbromide 5 which can be easily converted to (4-diphenylphosphinyl)-benzyl triphenylphosphonium bromide 6 and diphenylphosphine 7, respectively. In the presence strong bases 7 react aromatic aldehydes 8 substituted stilbenes 1. The yields depend on nature base solvent. trans configuration 1 is determined by i.r. 1H-n.m.r. measurements.
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