作者:Thomas J. Müller、Christoph J. Kressierer
DOI:10.1055/s-2004-817768
日期:——
Alkyne allyl alcohols 1 are cycloisomerized under Pd catalysis to give γ,δ-enals 2 in moderate to good yields. These mild reaction conditions are fully compatible with a subsequent Wittig olefination. Thus, the cycloisomerization-Wittig olefination sequence of yne allyl alcohols 1 and stabilized phosphorus ylides 3 furnishes 2,3,6,7-bisunsaturated carbonyl compounds 4 in moderate to good yields in a one-pot fashion.
炔基烯丙醇1在Pd催化下发生环化异构化,生成γ,δ-烯醛2,产率中等至良好。这些温和的反应条件完全适合后续的Wittig烯化反应。因此,炔基烯丙醇1和稳定磷酰化物3的环化异构化-Wittig烯化反应顺序,以一锅法生产2,3,6,7-双不饱和羰基化合物4,产率中等至良好。