Favoring Trienamine Activation through Unconjugated Dienals: Organocatalytic Enantioselective Remote Functionalization of Alkenes
作者:Liher Prieto、Garazi Talavera、Uxue Uria、Efraim Reyes、Jose L. Vicario、Luisa Carrillo
DOI:10.1002/chem.201304666
日期:2014.2.17
Unconjugated 2,5‐dienals are more reactive substrates than the corresponding fully conjugated α,β,γ,δ‐unsaturated aldehydes towards organocatalytic activation through trienamine intermediates. This difference in reactivity has been demonstrated in the Diels–Alder reaction with nitroalkenes, a reaction that proceeds with clean β,ε‐selectivity to afford the final products in high yields and stereoselectivities
与通过三烯胺中间体进行有机催化活化的相应的完全共轭的α,β,γ,δ-不饱和醛相比,未共轭的2,5-二烯醛的反应性更高。反应性的差异已在Diels-Alder与硝基烯烃的反应中得到证实,该反应以纯净的β,ε-选择性进行,从而以高收率和立体选择性提供最终产物,相关的多共轭2,4-二烯醛完全没有反应性。