六氟乙酰丙酮
六氟乙酰丙酮 | |
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IUPAC名 1,1,1,5,5,5-Hexafluoro-2,4-pentanedione | |
别名 | 1,1,1,5,5,5-六氟乙酰丙酮 1,1,1,5,5,5-六氟-2,4-戊二酮 HfacH |
识别 | |
CAS号 | 1522-22-1 |
PubChem | 73706 |
ChemSpider | 21106446 |
SMILES |
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InChI |
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InChIKey | QAMFBRUWYYMMGJ-UHFFFAOYAR |
性质 | |
化学式 | C5H2F6O2 |
摩尔质量 | 208.06 g/mol g·mol⁻¹ |
外观 | 无色液体 |
密度 | 1.47 g·cm−3(25 °C) |
沸点 | 70—71 °C(343—344 K)[1] |
溶解性(水) | 有机溶剂 |
危险性 | |
主要危害 | 有毒 |
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。 |
六氟乙酰丙酮是一种有机化合物,化学式为CF3C(O)CH2C(O)CF3,可简写为hfacH。它是无色液体,可作为配体并用于金属化学气相沉积。它只以烯醇(CF3C(OH)=CHC(O)CF3)的形式存在,而相应的乙酰丙酮仅含85%的烯醇异构。[2]相比乙酰丙酮金属配合物,六氟乙酰丙酮和金属形成的配合物有较高的挥发性和路易斯酸性。由于它是强亲电试剂,它在水中可以形成四醇。[3]
它最初由三氟乙酸乙酯和1,1,1-三氟丙酮的缩合反应制得。[4]它和1,2-苯二胺在三氟甲磺酸铁的催化下于DMF中加热反应,可以得到2-三氟甲基苯并咪唑。[5]
相关物质
六氟乙酰丙酮是乙酰丙酮两端甲基的六个氢被氟取代的产物,即1,1,1,5,5,5-六氟乙酰丙酮,尽管根据价键也可形成1,1,1,3,5,5-、1,1,3,3,5,5-或1,1,1,3,3,5-取代的同分异构体,但这三种物质尚未被发现。更多氟取代的1,1,1,3,5,5,5-七氟乙酰丙酮(CAS:77968-17-3)[6](异构体未知)和八氟乙酰丙酮(CAS:87291-32-5)[7]已有文献报道。
参考文献
- ^ Dong Hwan Lee, Sang-Eon Park, Kyuho Cho, Younsoo Kim, Taimur Athar, Ik-Mo Lee. Highly efficient microwave-accelerated preparation of β-ketoimines. Tetrahedron Letters. 2007-11, 48 (47): 8281–8284 [2021-09-20]. doi:10.1016/j.tetlet.2007.09.143. (原始内容存档于2018-06-13) (英语).
- ^ Jane L. Burdett; Max T. Rogers. Keto-Enol Tautomerism in β-Dicarbonyls Studied by Nuclear Magnetic Resonance Spectroscopy. I. Proton Chemical Shifts and Equilibrium Constants of Pure Compounds. J. Am. Chem. Soc. 1964, 86: 2105–2109. doi:10.1021/ja01065a003.
- ^ Aygen, S.; van Eldik, R. A Spectroscopic and Mechanistic Study of the Enolization and Diol Formation of Hexafluoroacetylacetone in the Presence of Water and Alcohol. Chem. Ber. 1989, 122 (2): 315. doi:10.1002/cber.19891220218.
- ^ Henne, Albert L.; Newman, Melvin S.; Quill, Laurence L.; Staniforth, Robert A. Alkaline condensation of fluorinated esters with esters and ketones. Journal of the American Chemical Society. 1947, 69 (7): 1819–20. doi:10.1021/ja01199a075.
- ^ Yanmei Zhou, Guanshuo Shen, Yuebo Sui, Haifeng Zhou. Fe(OTf) 3 -catalyzed practical synthesis of 2-trifluoromethylarylimidazoles from o -arylenediamines and hexafluoroacetylacetone. Tetrahedron Letters. 2016-07, 57 (30): 3396–3399 [2021-09-20]. doi:10.1016/j.tetlet.2016.06.086. (原始内容存档于2018-07-01) (英语).
- ^ Kurykin, M. A.; German, L. S.; Knunyants, I. L. Reaction of trans-perfluoro-2-pentene with ammonia(俄文). Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1980. 12: 2827-2829. ISSN 0002-3353.
- ^ Corti, Sandra; Pennington, William T.; DesMarteau, Darryl D. Trifluoromethylation of perfluorinated diacylfluorides: synthesis of the diketone CF3C(O)CF2C(O)CF3 and of new perfluorinated diol (CF3)2C(OH)CF2C(OH)(CF3)2. Acta Chimica Slovenica, 2013. 60 (3): 556-560. ISSN 1318-0207.