1,5-Naphthalenediamine synthesis
- Product Name:1,5-Naphthalenediamine
- CAS Number:2243-62-1
- Molecular formula:C10H10N2
- Molecular Weight:158.2
The potential for exposure to 1,5-naphthalenediamine may be greatest for workers involved in the manufacture of 1,5- naphthalene diisocyanate, which is known to hydrolyze readily to 1,5-naphthalenediamine upon contact with water.
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2243-62-1
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Yield:2243-62-1 93.6%
Reaction Conditions:
with ammonium hydrogen sulfite;ammonia in diethylene glycol dimethyl ether;water at 150; for 6 h;
Steps:
9 EXAMPLE 9 Amination of 5-amino-1-naphthol
In an autoclave was placed 8.0 g (0.05 moles) of 5-amino-1-naphthol, 10.2 g of 50% ammonium-hydrogensulfite aqueous solution, 30.4 g of 28% aqueous ammonia (0.5 moles of ammonia), and 25.0 g of diglyme, and the reaction was carried out at 150 C. for 6 hours. After the reaction mixture was cooled, the contents were dissolved in DMF. Quantification by HPLC indicated that the remaining content of 5-amino-1-naphthol, i.e., the starting material, was 6.2% and the yield of 1,5-diaminonaphthalene was 93.6% (selectivity 99.8%).
References:
Mitsui Chemicals, Inc. US2004/143137, 2004, A1 Location in patent:Page 5
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2243-62-1
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2243-62-1
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2243-62-1
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