respectively. Reactions of these species with arenes at C4 lead to products of arene propargylation, alternatively, reactions at C2 result in allenylation of arenes, followed by further transformation into furan-2-ones. Using quantum chemical calculations by the DFT method, it has been shown that the reactivity of such propargyl-allenyl cations is mainly explained by orbital factors. Plausible reaction mechanism
烷基-4-芳基的反应(或4,4-二芳基)-
4-羟基丁-2- ynOAtes [
氩(H或Ar')(OH)C 4 -C 3 ≡C 2 -CO 2 ALK]与
芳烃下三
氟甲基磺酸TfOH或HUSY
沸石的作用导致形成两种主要化合物:芳基取代的
呋喃-2-酮或富电子
芳烃的炔丙基化产物。在这些转换键的反应性中间体相应的起始butynOAtes中,Ar(H或Ar')(的O,O-双质子形式+ OH 2)C 4 -C 3 ≡C 2 - C(= O + H)(OAlk) ,其脱
水会产生介晶的炔丙基-烯丙基阳离子Ar(H或Ar')(OH)4 C+ -C 3 ≡C 2 -C(= O + H)(OAlk)↔的Ar(H或Ar')(OH) 4 C = C 3 = 2 Ç + -C(= O + H)(OAlk),在碳C4和C2上分别具有两个亲电中心。这些物质与
芳烃在C4的反应会导致
芳烃的炔丙基化产物,或者,在C2的反应会