Diisopropylethylamine → 3-cyano-N-[(2S)-2-(4-fluorophenyl)pent-4-en-1-yl]-N-methyl-5,6,7,8-tetrahydronaphthalene-1-carboxamide

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Reaction Steps

[(2S)-2-(4-Fluorophenyl)pent-4-en-1-yl]methylamine (see Bioorg. Med. Chem. Lett; 2001; 265-270; 300 mg, 1.55 mmol) was dissolved in CH2Cl2 (30 m]L) and to the resultant solution were added DIPEA (440 mg, 3.40 mmol) together with 3-cyano-5,6,7,8-tetrahydronaphthalene-1-carbonyl chloride (see WO 00/34243; 341 mg, 1.55 mmol). The mixture was stirred for 2 h at room temperature, diluted with CH2Cl2 (20 mL) and then washed with water, aqueous KHSO4 solution and finally with brine. The solution was dried over Na2SO4 and then the solvent was evaporated. The residue was chromatographed on silica gel using a mixture of heptane and ethyl acetate as eluent (7:3) and there was obtained 460 mg (78%) of 3-cyano-N-[(2S)-2-(4-fluorophenyl)pent-4-en-1-yl]-N-methyl-5,6,7,8-tetrahydronaphthalene-1-carboxamide as an oil. 1H NMR (400 MHz, CDCl3): 0.8-4.2 (cm, 16H), 4.8-5.1 (m, 2H), 5.6-5.8 (m, 1H), 6.7-7.4 (cm, 6H); LCMS: m/z 377 (M+1)+.

Provenance & Evidence