The by-product described in the title is shown to be 2-acetyl-4,7-diethoxycarbonyl-1,6-dimethylnaphthalene by hydrolysis and decarboxylation to 2-acetyl-1,6-dimethylnaphthalene. Since the 1,6-relationship of the methyls is known the acetyl was degraded to a methyl group via a haloform reaction, metal hydride reduction, and hydrogenolysis. The product was shown to be 1,2,6-trimethylnaphthalene by side-chain
通过
水解和脱羧成2-乙酰基-
1,6-二甲基萘,标题中所述的副产物显示为2-乙酰基-4,7-二乙氧基羰基-
1,6-二甲基萘。因为已知甲基的1,6-关系,所以乙酰基通过卤仿反应,
金属
氢化物还原和氢解被降解为甲基。通过侧链三
溴化显示产物为
1,2,6-三甲基萘,得到1,2,6-三
溴甲基萘,与真实样品相同,与1,4,6-三
溴甲基萘不同。考虑
萘的来源。