8-octahydrophenanthrene. The Semmler aromatisation reaction of this and related compounds was investigated and applied to the formation of 4-amino-5-methylphenanthrene. Alternative routes commencing from pyrene always gave internal cyclisation products caused by steric compression between the phenanthrene substituents at position 4 and 5. A useful variant of a Lossen-type reaction of dicarboxylic acid oxime toluene-p-sulphonates
对
4-羟基-4-甲基-
1,2,3,4,5,6,7,8-八氢菲的
亚硝酸酯进行光解,得到
4-羟基-5-羟基亚
氨基-4-甲基-1,2,3 ,4,5,6,7,8-八氢
菲。研究了该化合物和相关化合物的Semmler芳构化反应,并将其应用于4-
氨基-5-甲基
菲的形成。从pyr开始的替代途径总是产生内部环化产物,这是由于位置4和5上的
菲取代基之间的空间压缩而引起的。这些化合物据报道是二
羧酸肟甲苯-对-
磺酸酯的Lossen型反应的有用变体。