Cross-conjugated Trienamine Catalysis with α′-Alkylidene 2-Cyclohexenones: Application in β,γ-Regioselective Aza-Diels-Alder Reaction
作者:Zhi Zhou、Zhou-Xiang Wang、Qin Ouyang、Wei Xiao、Wei Du、Ying-Chun Chen
DOI:10.1002/chem.201605606
日期:2017.2.24
Endo‐type cross‐conjugated trienamines between highly congested α′‐alkylidene 2‐cyclohexenones and a chiral primary amine catalyst serve as HOMO‐raised dienophiles in inverse‐electron‐demand aza‐Diels–Alder cycloadditions with a number of 1‐azadiene substrates. The reactions exhibit exclusive β,γ‐regioselectivity, and multifunctional products with high molecular complexity are efficiently constructed
高度拥挤的α'-亚烷基2-环己烯酮与手性伯胺催化剂之间的内基型交叉共轭三烯胺在逆电子需求的氮杂-Diels-Alder环加成中,以HOMO引发的亲二烯体,具有许多1-氮杂二烯底物。该反应显示出独特的β,γ-区域选择性,并且以出色的非对映和对映选择性(> 19:1 dr,最高99%ee)有效地构建了具有高分子复杂性的多功能产品 。