the upper rim of calix[4]arene has been carried out for the first time. 25,27-Dialkoxy derivatives of calix[4]arene (R = Me, Et, n-Pr, n-Bu) were regioselectively deuterated at the parapositions of unsubstitutedphenolic rings using DCl/D2O in tetrachloroethane. Interestingly, identical reaction conditions do not lead to deuteration of mono- or tri-substituted derivatives where only simple cleavage
杯[4]芳烃上缘的直接氘化是第一次。使用DCl / D 2 O在四氯乙烷中的未取代酚环的对位,对杯[4]亚芳基的25,27-二烷氧基衍生物(R = Me,Et,n -Pr,n -Bu)进行区域选择性氘代。有趣的是,相同的反应条件不会导致仅观察到烷基取代基的简单裂解的单或三取代衍生物的氘代。