The decomposition of the [1:2-benzocyclenyl-3-methyl]-diazonium ions in acetic acid gives rise to the acetates of 3-hydroxymethyl-1:2-benzocyclene-1 (IV) as well as the ring enlarged 3- and 4- hydroxy-1:2-benzocyclenes-1 (VIII and VI). The ratio of these products is strongly dependent on the ring size. The primary carbonium ion XI seems plausible as the first intermediate. A conformational control
[1:2-苯并环烯基-3-甲基]-重氮离子在
乙酸中的分解产生3-羟甲基-1:2-苯并
环戊烯-1(IV)的
乙酸酯以及环扩大的3-和
4-羟基-1:2-苯并
环戊酮-1(VIII和VI)。这些产物的比例在很大程度上取决于环的尺寸。伯碳鎓离子XI似乎可以作为第一中间体。讨论了对芳基和烷基迁移程度的构象控制。