Cascade Polycyclization: Exploration of a Convergent Route to Access Various Tricyclic and Tetracyclic Products Related to Sterols
作者:Benoit Guay、Pierre Deslongchamps
DOI:10.1021/jo034280n
日期:2003.8.1
expedient synthesis of tricyclic and tetracyclic compounds via a cascade polycyclization methodology is described. Nazarov substrates (II) containing two Michael acceptors and a cyclohexenone ester (I) underwent cycloaddition followed by intramolecular 1,4-addition to furnish, in a highly stereoselective manner, tricyclic and tetracyclic products (III). Such compounds are interesting intermediates for the
描述了通过级联多环化方法方便地合成三环和四环化合物。包含两个迈克尔受体和一个环己烯酮酯(I)的纳扎罗夫底物(II)进行环加成反应,然后以高立体选择性的方式进行分子内1,4加成,以提供三环和四环产物(III)。这样的化合物是合成多环天然和非天然产物的令人感兴趣的中间体。