2,6-Difluorobenzaldehyde → trans-N-(7-Chloro-14-fluoro-2,3,4,14b-tetrahydro-1H-dibenzo[b,f]pyrido[1,2-d][1,4]oxazepin-1-yl)-2,2,2-trifluoroacetamide

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Preparation according to the procedures described in Example 72 for trans-N-(7-chloro-11-fluoro-2,3,4,14b-tetrahydro-1H-dibenzo[b,f]pyrido[1,2-d][1,4]oxazepin-1-yl)-2,2,2-trifluoroacetamide starting from 2,6-difluorobenzaldehyde (0.54 mL, 5 mmol) delivered the crude title compound. This compound was purified by column chromatography on silica gel with heptanes/ethyl acetate, column chromatography on silica gel with toluene/ethyl acetate=9/1 and finally crystallization from acetonitrile to yield the title compound (136 mg, 6% overall yield). Data: 1H-NMR (400 MHz, DMSO d6) 1.57-1.76 (m, 2H), 1.89-2.04 (m, 2H), 3.09-3.18 (m, 1H), 3.93 (br.d, J=14, 1H), 4.42 (d, J=10, 1H), 4.52-4.62 (m, 1H), 6.74 (dd, J=9, 3, 1H), 6.95-7.16 (m, 4H), 7.27-7.33 (m, 1H), 9.30 (d, J=9, 1H).

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