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- W2124276145 abstract "Diisopropylcyanamide reacts exothermically with trifluoroacetic anhydride to give 2, an equilibrium mixture, in C6D6 solution, of 1:1 adducts, N,N-diisopropyl-N‘,O-bis(trifluoroacetyl)isourea, 2a (10%), and N,N-diisopropyl-N‘,N‘-bis(trifluoroacetyl)urea, 2c (90%), at 27 °C. Compound 2c is a colorless solid, mp 49−51 °C. Thermolysis of 2, at 117 °C, shows first-order kinetics with the intital products being trifluoroacetonitrile, 4, and diisopropylcarbamic trifluoroacetic mixed anhydride, 3. Trifluoroacetonitrile trimerizes to 2,4,6-tris(trifluoromethyl)-1,3,5-triazine, and 3 is thermally labile giving diisopropyltrifluoroacetamide and CO2. In the thermolysis reaction 4 reacts with 2a to give a small amount of 4-(diisopropylamino)-4-(trifluoroacetoxy)-2,6-bis(trifluoromethyl)-4H-1,3,5-oxadiazine, 7. A related compound, 4,4-bis(diisopropylamino)-2,6-bis(trifluoromethyl)-4H-1,3,5-oxadiazine, 8, is formed from 7 and 2c going through a concentration maximum at 4000 s in the kinetic run. Compound 8 thermolytica..." @default.
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- W2124276145 date "2010-06-22" @default.
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- W2124276145 title "ChemInform Abstract: Formation of Urea, Isourea, and Triazine Derivatives from Diisopropylcyanamide with Trifluoroacetic Anhydride and Trifluoromethanesulfonic Anhydride: Thermal Instability of Urea and Isourea Derivatives." @default.
- W2124276145 cites W2950040999 @default.
- W2124276145 doi "https://doi.org/10.1002/chin.199820103" @default.
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