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Molecular and crystal structures of 6-trifluoromethyl-5-perfluoroethyl-7,7-difluoro-2,3-dihydro-1,4-dioxepin-5,6-trifluoromethyl-5-perfluoroethyl-2,3-dihydro-1,4-dioxepin-5-one-7 and 2-methyl-6-trifluoromethyl-5-perfluoroethyl-2,3-dihydro-1,4-dioxepin-5-one-7

✍ Scribed by S. V. Sereda; M. Yu. Antipin; Yu. T. Struchkov; V. F. Snegirev; K. N. Makarov

Publisher
SP MAIK Nauka/Interperiodica
Year
1989
Tongue
English
Weight
500 KB
Volume
30
Category
Article
ISSN
0022-4766

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Serendipity in perfluorinated series: un
Serendipity in perfluorinated series: unexpected synthesis of 7-(perfluoroalkyl)-2,3-dihydro-5H-1,4-dioxepin-5-one
✍ Barbara Villaume; Christine Gérardin-Charbonnier; Sylvie Thiébaut; Claude Selve 📂 Article 📅 2001 🏛 Elsevier Science 🌐 French ⚖ 58 KB

Treatment of [2-(perfluoroalkyl)-1,3-dioxolan-2-yl]acetic acids with thionyl chloride and a 48% HBr solution yields 7-polyfluoroalkyl-2,3-dihydro-5H-1,4-dioxepine-5-one. The production of this unexpected entity is explained by a rearrangement mechanism proposed in this work.

7,7-Dimethyl-2-phenyl-6,7-dihydro-1,2,4-
7,7-Dimethyl-2-phenyl-6,7-dihydro-1,2,4-triazolo[1,5-a][1,3,5]triazin-5-amine
✍ Dolzhenko, Anton V. ;Tan, Geok Kheng ;Koh, Lip Lin ;Dolzhenko, Anna V. ;Chui, Wa 📂 Article 📅 2007 🏛 International Union of Crystallography 🌐 English ⚖ 494 KB

The title compound, C 12 H 14 N 6 , was synthesized via cyclocondensation of 5-guanidino-3-phenyl-1,2,4-triazole with acetone. Only one tautomeric form with the NH H atom vicinal to the methyl groups was observed in the crystal structure. The triazine ring adopts a flattened half-boat conformation.