作者:Peter Rüedi、Conrad Hans Eugster
DOI:10.1002/hlca.19810640728
日期:1981.11.4
The hitherto unknown diterpenoid 14-hydroxytaxodione (10a) has been prepared by oxidation of 6β-hydroxyroyleanone. Its solutions exhibit a dynamic structural behaviour (UV./VIS/. and NMR.) and lead to an equilibrium mixture of the 11, 14- and the 6, 12-dioxo forms. By methylation and acetylation the 6, 12-dioxo form can be isolated. Chloroform solutions of 14-hydroxytaxodione slowly set up a mixture
迄今未知的二萜类14-羟基紫杉二酮(10a)是通过氧化6β-羟基丙酮基酮制备的。它的溶液表现出动态的结构行为(UV./VIS/。和NMR。),并导致11、14-和6、12-二氧六环形式的平衡混合物。通过甲基化和乙酰化,可以分离出6、12-二氧杂的形式。14-羟基紫杉二酮的氯仿溶液缓慢地建立了coleon V(2a),coleon U(3)和二聚体产物(后来确定为Grandidone C,randidone D和7-epigrandidone D)的混合物。因此,由于其强大的分子内氢键,可丽耐V(2a)比7,14-二羟基紫杉二酮(2b)更稳定。