Cyclohexyl isocyanate → (2z)-2-(3-Butyl-4,5-dimethyl-1,3-thiazol-2(3h)-ylidene)-n-cyclohexylacetamide

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Reaction Steps

To a solution of Example 1A (123 mg, 0.4 mmol) and cyclohexyl isocyanate (63 mg, 0.5 mmol) in CH2Cl2 (20 mL) at 0° C. was added dropwise a solution of DBU (0.076 mL, 0.5 mmol) in CH2Cl2 (5 mL). The mixture was allowed to warm to room temperature and stirred for 14 hours. The mixture was washed sequentially with water, brine and dried over anhydrous MgSO4, filtered and concentrated under reduced pressure. The residue was purified by column chromatography over silica gel (CH2Cl2-MeOH 9:1) to provide the title compound. 1H NMR (300 MHz, DMSO-d6) δ 0.96 (t, J=7 Hz, 3H), 1.10 (m, 3H), 1.29 (m, 4H), 1.51 (m, 3H), 1.70 (m, 4H), 1.95 (s, 3H), 2.02 (s, 3H), 3.33 (m, 3H), 5.02 (s, 1H), 6.74 (br d, J=7 Hz, 1H); MS (ESI) m/z 309 (M+H)+. Anal calcd for C17H28N2OS.0.25H2O: C, 65.24; H, 9.18; N, 8.95. Found: C, 65.49; H, 9.30; N, 8.93.

Provenance & Evidence