[Br:1][C:2]1[S:6][CH:5]=[C:4]([C:7]([OH:9])=O)[CH:3]=1.Cl.[CH3:11][C:12]1([CH3:19])[CH2:18][CH2:17][CH2:16][NH:15][CH2:14][CH2:13]1.C(N(CC)CC)C.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>C(#N)C.O>[Br:1][C:2]1[S:6][CH:5]=[C:4]([C:7]([N:15]2[CH2:16][CH2:17][CH2:18][C:12]([CH3:19])([CH3:11])[CH2:13][CH2:14]2)=[O:9])[CH:3]=1
5-Bromo-thiophene-3-carboxylic acid (0.5 g, 2.42 mmol), 4,4-dimethyl-azepane hydrochloride (0.475 g, 2.91 mmol), triethylamine (1.01 mL, 7.25 mmol) and HATU (1.20 g, 3.16 mmol) were dissolved in acetonitrile (10 mL) and the resulting mixture stirred overnight. The mixture was diluted with water and extracted with DCM (×2). The organics were dried over sodium sulfate, filtered and evaporated. The crude material was purified by chromatography on a silica II cartridge, eluting with 10-25% ethyl acetate in cyclohexane. The fractions containing the desired product were concentrated under vacuum to give (5-bromo-thiophen-3-yl)-(4,4-dimethyl-azepan-1-yl)methanone (0.55 g).
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