Rearrangements of the 28-methyl group of pachysonol and pachysandiol-B derivatives in the reaction with methanesulfonyl chloride were examined. It was found that two kinds of methyl-migrated products [(IIa, IIb, and VIIIa) and (IVa, IVb, and Xa)] were formed in addition to normally dehydrated products (IIIa, IIIb, and IX), and their structures were elucidated by chemical and spectroscopic methods.
                                    研究人员考察了茯苓醇和茯苓二醇-B 衍
生物在与甲
磺酰氯反应过程中 28-甲基的重排情况。结果发现,除了正常脱
水产物(IIIa、IIIb 和 IX)之外,还形成了两种甲基移位产物[(IIa、IIb 和 VIIIa)和(IVa、IVB 和 Xa)],并通过
化学和光谱方法阐明了它们的结构。