Naphthalene, 1,4,5,8-tetrabromo- synthesis
- Product Name:Naphthalene, 1,4,5,8-tetrabromo-
- CAS Number:6596-45-8
- Molecular formula:C10H4Br4
- Molecular Weight:443.75
81-30-1
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Yield:6596-45-8 10%
Reaction Conditions:
with bromine;sodium hydroxide in water at 90 - 95; for 24 h;
Steps:
1 Preparation of Compound 1a
20 ml 1M NaOH was added to a suspension of compound 2a (4.00 mmol) in 20 ml water and the mixture was stirred to obtain a limpid solution. Bromine (1.0 ml, 3.11 g) was added in one portion and the reaction mixture was stirred at 90-95° C. for 24 h. The precipitate was filtered and dried. The crude solid was extracted with dichloromethane. Organic solvent was evaporated to dryness and compound 1a was purified by column chromatography using hexane as eluent on silica. Yield 180 mg (10%). FD-Mass: calc.: 443.75 found: 444.0. 1H-NMR (δ(ppm), CD2Cl2): 7.66 (s, 4H, CH); 13C-NMR (δ(ppm), CD2Cl2): 120.54 (4C, CBr); 130.49 (2C, C); 135.91 (4C, CH).
References:
US2015/225418,2015,A1 Location in patent:Paragraph 0311; 0312
154190-75-7
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