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題 名 | Can be Azo Dyes Obtained by Grinding under Solvent-free Conditions? |
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作 者 | Noroozi-Pesyan, Nader; Khalafy, Jabbar; Malekpoor, Zahra; | 書刊名 | Journal of the Chinese Chemical Society |
卷 期 | 56:5 2009.10[民98.10] |
頁 次 | 頁1018-1027 |
分類號 | 346 |
關鍵詞 | Azo dyes; Solvent-free; Self-catalyzed diazotization; Zwitterions; Sulfanilic acid; p-Toluenesulfonic acid; Green chemistry; |
語 文 | 英文(English) |
英文摘要 | The solid–solid reactions of some electron-donors with sulfanilic acid in the presence of solid sodium nitrite afford azo dyes by self-catalyzed diazotization of sulfanilic acid (2) under solvent-free condition with moderate yields. Also the reactions of some electron-donors with diazotization of o-nitroaniline (5), m-nitroaniline (6) and p-nitroaniline (7) in the presence of solid sodium nitrite catalyzed by p-toluenesulfonic acid (PTSA) afford azo dyes under solvent-free condition in good yields. This new method totally avoids the use of acids, alkalies, toxic and/or expensive solvents in diazotization and diazo coupling reactions. |
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