The Synthesis of Internal Conjugated (<i>E</i>)-Enynyldialkylboranes and Their Applications to the Syntheses of Conjugated Alkynones, Conjugated (<i>E</i>)-Enynes, and Conjugated Enynes Bearing an Unsaturated Group on the Double Bond
作者:Masayuki Hoshi、Yuzuru Masuda、Akira Arase
DOI:10.1246/bcsj.58.1683
日期:1985.6
(E)-Enynyldialkylboranes, thus obtained, gave regio- and/or stereospecifically defined corresponding conjugated alkynones by alkaline hydrogen peroxide oxidation, conjugated (E)-enynes by protonolysis with acetic acid, and conjugated enynes bearing an unsaturated group on the internal alkenyl carbon atom by bis(acetylacetonato)copper-catalyzed cross-coupling reaction with allyl bromide or 1-bromo-1-hexyne respectively
Versatile synthesis of α, β-acetylenic ketones by oxidative nucleophilic addition of vanadium acetylides
作者:Toshikazu Hirao、Daisuke Misu、Toshio Agawa
DOI:10.1016/s0040-4039(00)84141-6
日期:1986.1
Treatment of aldehydes with vanadium acetylides generated from equimolar amounts of vanadium trichloride and acetylenic Grignard or lithium compounds gave α,β-acetylenicketones via oxidative nucleophilic addition.