Addition Reactions of Tertiary Silylphosphanes with Acetylenic Ketones and Aldehydes
作者:Gerhard Maas、Martin Reisser、Alexandra Maier
DOI:10.1055/s-2002-33533
日期:——
(Trimethylsilyl)phosphanes Me 3 Si-PR 2 (PR 2 = PPh 2 . PEt 2 , 1-phospholanyl) add smoothly across the C≡C bond of acetylenic ketones RCOC≡CPh to form (Z)-3-phosphanyl-2-(trimethyl-silyl)prop-2-en-(-ones 3 (3,4-addition). Thermal isomerization of the latter yields the corresponding 3-(trimethylsilyl)oxy-allenylphosphane 6, formally the product of a 1,4-addition. Mainly 1,2-addition occurs with propiolic
(Trimethylsilyl)phosphanes Me 3 Si-PR 2 (PR 2 = PPh 2 . PEt 2 , 1-phospholanyl) 通过炔酮 RCOC≡CPh 的 C≡C 键平滑加成形成 (Z)-3-phosphanyl-2- (trimethyl-silyl)prop-2-en-(-ones 3 (3,4-addition). 后者的热异构化产生相应的 3-(trimethylsilyl)oxy-allenylphosphane 6,形式上是 1,4-此外,主要是与丙炔醛发生 1,2-加成,产生(1-[(三甲基甲硅烷基)氧基]炔丙基)膦 4. 3b 的脱甲硅烷基化反应产生(3-氧代丙基)膦氧化物 7 或(3-氧代丙烯基)膦氧化物 8。