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| | 4,6-Diaminoresorcinol dihydrochloride Basic information |
| Product Name: | 4,6-Diaminoresorcinol dihydrochloride | | Synonyms: | 4,6-DIAMINO-BENZENE-1,3-DIOL 2HCL SALT;4,6-DIAMINORESORCINOL DIHYDROCHLORIDE;4,6-DIAMINORESORCINOL HCL;4,6-DIAMINO RESORCINOL HYDROCHLORIDE;4,6-DIHYDROXY-1,3-PHENYLENEDIAMINE DIHYDROCHLORIDE;4,6-Diamino-1,3-Benzenediol HCl;4,6-Diamino-1,3-benzenediol dihydrochloride;4,6-diamino-1,3-benzenediol hydrochloride | | CAS: | 16523-31-2 | | MF: | C6H10Cl2N2O2 | | MW: | 213.06 | | EINECS: | | | Product Categories: | Fluorenes, etc. (reagent for high-performance polymer research);Functional Materials;Reagent for High-Performance Polymer Research;Organic Building Blocks;Oxygen Compounds;Polyols;Benzene derivates;API intermediates;Aromatic Phenols | | Mol File: | 16523-31-2.mol |  |
| | 4,6-Diaminoresorcinol dihydrochloride Chemical Properties |
| | 4,6-Diaminoresorcinol dihydrochloride Usage And Synthesis |
| Chemical Properties | grey-brown crystalline solid | | Uses | 4,6-Diaminoresorcinol dihydrochloride may be used as a precursor in the synthesis of:
- poly(p-phenylene benzobisoxazole) (PBO)
- poly(2,6-naphthalenebenzobisoxazole) (Naph-2,6-PBO)
- poly(1,5-naphthalenebenzobisoxazole) (Naph-1,5-PBO)
| | Synthesis | The general procedure for the synthesis of 4,6-diaminoresorcinol dihydrochloride from resorcinol was as follows: the reaction was carried out by the one-pot method under the molar ratio of phosphorus pentoxide/methanesulfonic acid/hydroxylamine hydrochloride/acetic acid/resorcinol of 0:4:2:2:1. The specific operation was as follows: first, resorcinol (5.50 g) and acetic acid (6.00 g) were added to a 100 mL three-necked flask, followed by the addition of methanesulfonic acid (13 mL, 0.2 mol), and the reaction system was warmed up to 100 °C after stirring until complete dissolution. Next, hydroxylamine hydrochloride (7.00 g) was slowly added and the reaction was continued at this temperature for 4 hours. Upon completion of the reaction, 6 mol/L hydrochloric acid (40 mL) was added to the system and stirring was continued. The reaction mixture was cooled at 100 °C for 2 h, during which time crystals precipitated. The crystals were collected by filtration, washed sequentially with hydrochloric acid and ethanol, and finally dried under vacuum to afford the target product 4,6-diaminoresorcinol dihydrochloride in 5.0% yield. | | References | [1] Patent: CN108191678, 2018, A. Location in patent: Paragraph 0016-0021
[2] Patent: CN103724216, 2016, B
[3] Patent: CN104098590, 2016, B |
| | 4,6-Diaminoresorcinol dihydrochloride Preparation Products And Raw materials |
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