Ammonia → 6'-Bromo-4-(difluoromethyl)-5''-methyl-3'H-dispiro[cyclohexane-1,2'-indene-1',2''-imidazol]-4''-amine

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6′-Bromo-4-(difluoromethyl)-5″-methyl-3′H-dispiro[cyclohexane-1,2′-indene-1′,2″-imidazole]-4″(3″H)-thione (Example 128 Step 3, 0.3 g, 0.73 mmol) was taken up in ammonia (7 M in MeOH) (6.22 mL, 43.6 mmol) and the resulting mixture was heated in the microwave reactor at 110° C. for 30 min. The solvent was evaporated. The same amount of ammonia was added and the mixture was heated and concentrated (5 times). The crude material was dissolved in EtOAc. Aq. citric acid solution (0.1 M) was added and the phases were separated. The citric acid phase was basified with 1 M NaOH and extracted with DCM twice. The combined DCM extracts were concentrated to give the title compound (0.120 g, 42% yield). 20 mg of the product was purified by preparative chromatography to give 11 mg of the title compound: 1H NMR (500 MHz, DMSO-d6) δ ppm 1.19-1.31 (m, 3H), 1.34-1.48 (m, 3H), 1.66-1.82 (m, 2H), 1.90 (d, 1H), 2.20 (s, 3H), 2.80-2.95 (m, 2H), 5.53-5.97 (m, 1H), 6.53 (s, 2H), 6.59 (s, 1H), 7.21 (d, 1H), 7.33 (d, 1H); MS (ES+) m/z 396 [M+H]+.

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