described. The syntheses are based on the conjugate addition-azoalkene-asymmetric olefination strategy. Its key features are (1) the stereoselective establishment of the complete ω-side chain of 2 and 3 through conjugate addition of the enantiopure C13−C20 alkenylcopper derivative 10 to the enantiopure C6−C12 bicyclic azoalkene 9 and (2) the 5E-stereoselective construction of the α-side chain through a Hor
3- oxacarbacyclin(的一个完全立体控制合成3)和
卡巴环素(正式合成2)中有所描述。合成基于共轭加成-偶氮烯烃-不对称烯烃化策略。其主要特征是:(1)立体选择性建立的完整ω位侧链的2和3通过共轭加成的对映体纯C13-C20的alkenylcopper衍
生物10的对映体纯C6-C12双环azoalkene 9和(2)5 ë - α-侧链的立体结构通过双环酮的霍纳-沃兹沃思-埃蒙斯烯7与手性膦
锂26与酯E - 27形成。烯丙基醇6在后期用作2和3的合成中的联合中间体。