Polyketo-enols and chelates. Part IV. The by-product in the xanthophanic–glaucophanic enol reaction: 2-acetyl-4,7-alkoxycarbonyl-1,6-dimethylnaphthalane
作者:L. Crombie、D. E. Games、M. H. Knight
DOI:10.1039/j39670000777
日期:——
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。