Palladium-Catalyzed Heck Reaction on 1-Alkoxy-1,3-dienes: A Regioselective γ-Arylation of α,β-Unsaturated Carbonyl Compounds
作者:Annamaria Deagostino、Cristina Prandi、Paolo Venturello
DOI:10.1021/ol035258j
日期:2003.10.1
[reaction: see text] alpha,beta-Unsaturated acetals afford, in the presence of the LIC-KOR superbase, 1-alkoxybuta-1,3-dienes. These substrates cross couple with aryl derivatives in the presence of Pd catalyst (Heck conditions) in a regio- and stereoselective mode. With dialkyl acetals, the reaction affords arylated dienes; on the other hand, in the case of 1,3-dioxane derivatives, the final outcome
[反应:见正文]在LIC-KOR超碱存在下,α,β-不饱和乙缩醛可提供1-烷氧基丁1,3-二烯。这些底物在Pd催化剂存在下(Heck条件)以区域选择性和立体选择性方式与芳基衍生物交叉偶联。用二烷基乙缩醛,反应得到芳基化的二烯; 另一方面,在1,3-二恶烷衍生物的情况下,该方法的最终结果形式上对应于起始的α,β-不饱和物质的直接γ-芳基化反应。