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CAS RN: 111160-56-6 | 产品编码: D2038
Diphenyl (2,3-Dihydro-2-thioxo-3-benzoxazolyl)phosphonate
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技术规格
| Appearance | White to Almost white powder to crystal |
| Purity(Neutralization titration) | min. 98.0 % |
| Melting point | 81.0 to 86.0 °C |
物性（参考值）
| 熔点 | 84 °C |
| 溶解性（微溶于） | 甲醇 |
GHS
相关法规
运输信息
| HS编码* | 2934.99-000 |
应用
A Condensing Agent
Experimental procedure2): Diphenyl (2,3-dihydro-2-thioxo-3-benzoxazolyl)phosphonate (3.38 g, 8.8 mmol) is added to a solution of 1 (2.56 g, 8 mmol) and triethylamine (1.12 mL, 8 mmol) in 10 mL of NMP. After stirring for 30 min at room temperature, 3-iodoaniline (1.75 g, 8 mmol) is added. The solution is stirred for 2 h and poured into 1% aqueous sodium hydrogen carbonate. Then EtOH is added to the mixture. The precipitate is filtered off washed with EtOH/water (200 mL/300 mL). The product is dissolved in boiling EtOH (600 mL) and cooled to recrystallize. The product is further purified by recrystallization to afford 2 as a white powder (3.14 g, 6.02 mmol, 75%).
References
- 1)Diphenyl (2,3-dihydro-2-thioxo-3-benzoxazolyl)phosphonate: a new, reactive activating agent for the synthesis of amides and polyamides
- 2)Sequence-Specific Binding of m-Phenylene Ethynylene Foldamers to a Piperazinium Dihydrochloride Salt
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