1,1′-Dimethyl and 1,1′-dichloro derivatives of the titled dimeric compound were prepared. A twisting of the central C2=C2′ double bond in the above-mentioned dimers was suggested based on the bathochromism observed in the absorption spectra. The 1,1′-dimethyl dimer was autoxidized at the enamine-type C1=C10b double bond to give 1,10b-dioxygenated products, while the 1,1′-dichloro dimer underwent a
制备标题二聚化合物的1,1'-二甲基和1,1'-二
氯衍
生物。基于在吸收光谱中观察到的红移现象,建议上述二聚体中的中央 C2=C2' 双键发生扭曲。1,1'-二甲基二聚体在烯胺型 C1=C10b 双键处自动氧化得到 1,10b-二氧化产物,而 1,1'-二
氯二聚体经过
氯氢交换得到 1,1 '-二氢化合物在 n-BuOH 和
1,1,2,2-四氯乙烷中加热。这些反应可能是由 1,1'-二取代二聚体的扭曲 C2=C2' 双键周围的应变引起的。