作者:Günter Kreiselmeier、Baldur Föhlisch
DOI:10.1016/s0040-4039(99)02296-0
日期:2000.2
Lasidiol, a sesquiterpenoid with a carotane skeleton, and its 8a-epimer have been synthesized in 12 steps starting from 2-methylfuran. Key elements in the synthesis are constructions of the carbon framework in an intramolecular [4+3] cycloaddition and cleavage of the epoxy-bridge by reductive elimination with sodium naphthalenide after reduction and hydrogenation of the bromo-substituted cycloadducts
从2-甲基呋喃开始,已分12步合成了具有二醇骨架的倍半萜类化合物Lasidiol及其8a-顶基。合成中的关键元素是在分子内[4 + 3]环加成中的碳骨架结构,以及在溴取代的环加合物还原和氢化后,通过萘化钠的还原消除反应,裂解环氧桥的方法。