Reactions of cyclohexadienes. Part VIII. Stereoselective and nonstereoselective syntheses of (±)-juvabione
作者:A. J. Birch、P. L. Macdonald、V. H. Powell
DOI:10.1039/j39700001469
日期:——
readily available dihydroanisoles and several αβ-unsaturated ketones have previously been shown to undergo acid-catalysed ring-opening to yield 4-substituted cyclohexenones. As the first example of the utility of this general process in natural product synthesis, a simple and efficient synthesis of (±)-juvabione diastereoisomers has been carried out. The synthesis was extended to yield (±)-juvabione in a
先前已证明,容易获得的二氢茴香醚和几种αβ-不饱和酮的Diels-Alder加合物会发生酸催化的开环反应,从而生成4-取代的环己烯酮。作为该一般方法在天然产物合成中的实用性的第一个例子,已经进行了简单且有效的合成(±)-木豆香酮非对映异构体。该合成以立体选择性的方式扩展以产生(±)-木瓜二酮,并证实了最近修订的(±)-木瓜二酮的立体化学。