[F:1][CH:2]([F:8])[CH2:3][O:4]C(=O)C.[CH2:9]([NH2:21])[CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH3:20].C(NC(=O)C(F)F)CC>C(#N)C>[CH2:9]([NH:21][C:3](=[O:4])[CH:2]([F:1])[F:8])[CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH3:20]One equivalent difluoroethylacetate and one equivalent dodecylamine stirred at room temperature in acetonitrile 16 hours. The solvent is removed to give a white wax, which is chromatographed on silica gel in CHCl3 /EtOAc (15:1), Rf =0.7. NMR (CDCl3, δ) 7.2 b-s (1H); 5.9 g (2H) J=26; 3.35 m (2H); 1.3 s (20H); 0.9 m (3H). Other compounds prepared this way, with similar NMR, acceptable Mass Spectra and TLC: N-propyl-difluoroacetamide.
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