Stereocontrolled intramolecular nitrile oxide cycloaddition reaction using a gauche–gauche interaction
作者:Michihiko Noguchi、Aiko Tsukimoto、Ayako Kadowaki、Jun Hikata、Akikazu Kakehi
DOI:10.1016/j.tetlet.2007.03.094
日期:2007.5
A gauche–gauche interaction is proposed as a powerful controlling factor for the stereochemistry in the intramolecular nitrile oxide cycloaddition reaction derived from N-protected 3-(N-allylamino)propionaldehyde and 2-(N-homoallylamino)acetaldehyde oximes. High levels of stereoselectivity (76% de to perfect) were obtained from the reaction involving nitrile oxides with substituents at the adjacent
gauche-gauche相互作用被认为是由N-保护的3-(N-烯丙基氨基)丙醛和2-(N-高烯丙基氨基)乙醛肟衍生的分子内腈氧化环加成反应中立体化学的强大控制因素。高水平的立体选择性(至完美的76%)是由涉及在与氮系键氮相邻的碳原子上具有取代基的腈氧化物的反应获得的。