(trimethylsilyl) 10-lithio 9,10-dihydroanthracene undergoes an intramolecular [1,4] rearrangement to lead, after protonation, to cis 9,10-bis (trimethylsilyl) 9,10-dihydroanthracene (II) with a high yield. This shift, rarely encountered in anionic carbon skeletons, is believed to be favoured by structural factors and stabilisation of a carbanion α to silicon.
9,9-双(三甲基甲
硅烷基)10-
硫代
9,10-二氢蒽经过质子化后分子内[1,4]重排导致顺式9,10-双(三甲基甲
硅烷基)
9,10-二氢蒽(II)高产量。据认为,这种转变是阴离子碳骨架中很少遇到的,它受结构因素和碳负离子α稳定化为
硅的促进。