Asymmetric Synthesis of Polyfunctionalized Allenic Esters: Toward the Synthesis of an Iphionane Sesquiterpene
作者:Michel Miesch、Aurélie Klein
DOI:10.1055/s-2006-942463
日期:2006.8
smoothly with optically active acetylenic ω-keto esters to afford optically active allenic esters (ee >95%) in high yield. After protection of the hydroxyl group, the addition of morpholine followed by an acidic hydrolysis, quantitatively led to optically active bicyclic α,β-unsaturated ketones (ee >95%). By using this methodology, the formal synthesis of an iphionane sesquiterpene was achieved.
四丁基氟化铵 (TBAF) 与旋光炔属 ω-酮酯平稳反应,以高收率提供旋光丙二烯酯 (ee >95%)。羟基保护后,加入吗啉,然后进行酸性水解,定量地产生光学活性双环 α,β-不饱和酮 (ee >95%)。通过使用这种方法,实现了 iphionane 倍半萜的正式合成。