中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4-硝基-1,8-萘醛酸酐 | 4-nitronaphthalic-1,8-anhydride | 6642-29-1 | C12H5NO5 | 243.175 |
1,8-萘二甲酸二甲酯 | dimethyl naphthalene-1,8-dicarboxylate | 10060-33-0 | C14H12O4 | 244.247 |
The preparation of 5-nitroacenaphthene (2) using several nitrating agents resulted in a product which was found to be contaminated with 20–30% of the 3-nitro isomeride. Separation was accomplished by t.l.c. and the n.m.r. spectra of the isomers are now reported. A new synthesis of 4,5-dinitronaphthalic anhydride (5) and an improved preparation of the dimethyl and diethyl esters of 4-nitronaphthalic anhydride and 5 is described. The esters were converted to the corresponding diamino derivatives by high pressure hydrogen–Pd reduction.