| 摘要 |
The invention comprises 1-(2-hydroxyethyl)-amino - 2 - nitro - 4 - (2 - hydroxyethyl) - methyl-amino - benzene and 1 - amino - 2 - nitro - 4(2-hydroxyethyl) methylamino benzene. The compounds are prepared by refluxing 1-amino-2-nitro - 4 - methylamino - benzene with an ethylene halohydrin. The dihydroxy compound may also be prepared by refluxing 1-amino-2-nitro - 4 - methylacetylamino - benzene with 2-chloroethyl chloroformate, deacetylating with conc. HCL, and then refluxing the product, with or without a prior treatment with potash to cause hydroxyethylation in position 1, with an ethylene halohydrin. Ethylene bromohydrin is the preferred halohydrin.ALSO:The invention comprises 1-(2-hydroxyethyl) amino - 2 - nitro - 4 - (2 - hydroxyethyl)-methylamino-benzene and 1 - amino - 2 - nitro-4 - (2 - hydroxyethyl) methylamino - benzene. The compounds are prepared by refluxing 1-amino - 2 - nitro - 4 - methylamino - benzene with an ethylene halohydrin. The dihydroxyethyl compound may also be prepared by refluxing 1 - amino - 2 - nitro - 4 - methylacetylamino-benzene with 2-chloroethyl formate to give the 2-chloroethyl ester of (2-nitro-4-methylacetylamino) - phenylcarbamic acid, deacetylating with concHCl, and then refluxing the product, with or without a prior treatment with potash to cause hydroxyethylation in position 1, with an ethylene halohydrin. Ethylene bromohydrin is the preferred halohydrin.ALSO:Compositions containing 1-(2-hydroxyethyl) amino-2-nitro -4-(2-hydroxyethyl)-methylamino benzene are used to dye hair. The composition may also include other nitro, azo or anthraquinone dyes. The dyes are preferably used at alkaline pH. Other additives that may be present include organic solvents, detergents and lacquers. The dyes do not require the presence of an oxidising agent. |
