The oxidation of 3,4-bis(diphenylmethylene)-succinic anhydride (I), -1-benzylsuccinimide (VI), and -γ-butyrolactone (VIII) with nitric acid afforded the corresponding 2,5-dihydrofuran derivatives, III, VII, and IX respectively. The same oxidation of 3,4-bis(diphenylmethylene)cyclobutane-1,2-dione (XI) afforded 3,4-bis(diphenylhydroxymethyl)cyclobut-3-ene-1,2-dione (XIII), probably via the bicyclic cyclobutenedione intermediate (XII).
用
硝酸氧化 3,4-双(二苯基亚甲基)-
丁二酸酐(I)、-1-苄基丁二
酰亚胺(VI)和-
γ-丁内酯(VIII),分别得到相应的
2,5-二氢呋喃衍
生物 III、VII 和 IX。同样氧化 3,4-双(二苯基亚甲基)
环丁烷-1,2-二酮 (XI),得到 3,4-双(二苯基羟甲基)环丁-3-烯-1,2-二酮 (XIII),可能是通过双环环
丁二酮中间体 (XII)。