A Bioinspired Approach to Tri-<i>nor</i>-guaianes. Synthesis of (−)-Clavukerin A
作者:Gonzalo Blay、Begoña García、Eva Molina、José R. Pedro
DOI:10.1021/np060184g
日期:2006.8.1
degradation of the C-7 side chain of related guaia-11-enes is described. In this approach (-)-clavukerin A (1) is obtained by selective ozonolysis-Criegge rearrangement of (+)-1alphaH,7alphaH,10alphaH-guaia-4,11-dien-3-one (4) to afford 7beta-hydroxy and 7beta-acetoxy tri-nor-guaiane derivatives 6 and 7, respectively, which after elimination and deoxygenation give the title compound. The starting guaiadienone
描述了通过降解相关的guaia-11-enes C-7侧链的生物启发的方法来制备tri-nor-guaianes。在这种方法中,通过选择性的臭氧分解-(+)-1alphaH,7alphaH,10alphaH-guaia-4,11-dien-3-one(4)的臭氧重排-Criegge重排获得(-)-clavukerin A(1),得到7beta-hydroxy和7β-乙酰氧基三正瓜氨酸衍生物6和7,它们在消除和脱氧后得到标题化合物。起始愈创木酚二酮易于从市售的桑顿宁或(+)-二氢香芹酮中获得。