A study of the effects of exopericyclic stereocentres on the stereoselectivity of JohnsonâClaisen rearrangements of thioether-containing allylic alcohols shows that selectivity is highly dependent upon allylic substitution patterns.
                                    一项关于外环立体中心对含
硫醚烯丙基醇的约翰逊-克莱森重排立体选择性影响的研究表明,选择性在很大程度上取决于烯丙基取代模式。