18826-29-4
5,12-bis(phenylethynyl)naphthacene
CAS: 18826-29-4
Molecular Formula: C34H20
18826-29-4 - Names and Identifiers
| Name | 5,12-bis(phenylethynyl)naphthacene |
| Synonyms | Einecs 242-605-4 5,12-bis(phenylethynyl)tetracene 5,12-bis(phenylethynyl)naphthacene 5,12-bis(phenylethynyl)-naphthacen 5,12-Bis(phenylethynyl)naphthacene 5,12-bis(2-phenylethynyl)tetracene 5,12-Bis-(phenylethynyl)-naphthacene Naphthacene, 5,12-bis(phenylethynyl)- BPEN, 5,12-bis(phenylethynyl)naphthacene 5,12-BIS(PHENYLETHYNYL)NAPHTHACENE, TECH . |
| CAS | 18826-29-4 |
| EINECS | 242-605-4 |
| InChI | InChI=1/C34H20/c1-3-11-25(12-4-1)19-21-31-29-17-9-10-18-30(29)32(22-20-26-13-5-2-6-14-26)34-24-28-16-8-7-15-27(28)23-33(31)34/h1-18,23-24H |
18826-29-4 - Physico-chemical Properties
| Molecular Formula | C34H20 |
| Molar Mass | 428.52 |
| Density | 1.25±0.1 g/cm3(Predicted) |
| Melting Point | 248°C (dec.)(lit.) |
| Boling Point | 683.7±28.0 °C(Predicted) |
| Flash Point | 369.5°C |
| Vapor Presure | 9.02E-18mmHg at 25°C |
| Refractive Index | 1.784 |
18826-29-4 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
18826-29-4 - Reference Information
| Uses | 5,12-bis (phenylethynyl) tetraphenes are benzene derivatives and can be used as pharmaceutical intermediates. |
| application | 5, 12-bis (phenylethynyl) tetraphenes are organic synthesis intermediates and pharmaceutical intermediates, which can be used in laboratory research and development processes and chemical medicine research and development processes. |
| Preparation | 1) Add 51.0g(0.50 mol) of anhydrous dioxane to a 600ml suspension of 11.5g(0.50 mol) of lithium amide, and heat the mixture to reflux for 2 hours. 52.0g(0.50 moles) of 9,10-anthraquinone was added to the warm mixture and the mixture was heated and refluxed for 16 hours. The cooled mixture was treated with 1 liter of 0.5M aqueous ammonium chloride solution. The product is filtered out and washed with water. Recrystallized with acetonitrile to obtain colorless crystals. 220 ℃ (melting point M.P.206-207), yield 47%. 2) Dissolve 5g 9,10-dihydroxy -9,10-bis (phenylacetylene) 9,10-dihydroanthracene in 50ml dioxins. 3) Lithium phenylacetylene is prepared from 14.85 grams (0.146 moles) of phenylacetylene and 2.80 grams (0.122 moles) of lithium amide in 100 ml, then 15.7 grams of 0.25(0.061 moles) of 5,12-naphthalenoquinone are added to 150 ml of 0.83 dioxane, the mixture is refluxed for 4 hours, then cooled and treated with 3.50ml of 0.5M aqueous ammonium chloride. The product was recrystallized with benzene to give 15.95g(57%) of colorless crystals 5,12-dihydroxy-5, 12-bis (phenylacetylenyl)-5,12-dihydronaphene, M.P. 216.5-218 ℃ (decomposition). 4) In 200 ml of 29g stannous chloride solution, 14.4 g5,12-dihydroxy -5,12-bis-(phenylacetynyl)-5,12-dihydronaphthalene in 50ml of aqueous acetic acid was slowly added and incorporated into dioxane. The mixture was stirred at room temperature for 2 hours, then diluted to a volume of 1,500ml, and the crude product was recrystallized with benzene to obtain 8.1g(63%) crimson purple needles 5,12-bis (phenylethynyl) and tetrabenzene. |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
Last Update：2024-04-10 22:29:15
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View History
18826-29-4
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2561513-53-7
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447462-87-5
2561513-53-7
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6-CHLOROHEXANAL
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直接黄106
氧杂环戊烷