tert-Butyl 4-(5-amino-1H-indol-3-yl)cyclohexyl(ethyl)carbamate → HCID 178465425, compound

Participants

Reaction Steps

A solution of compound 119 (0.4 g, 1.119 mmol) in dry ethanol (20 mL) was treated with thiophene-2-carboximidothioic acid methyl ester hydroiodide (0.63 g, 2.239 mmol) at room temperature and stirred for 24 h. The solvent was evaporated, diluted with sat. NaHCO3 solution (20 mL) and product was extracted into CH2Cl2 (2×25 mL). The CH2Cl2 layer was washed with brine (20 mL) and dried (Na2SO4). The solvent was evaporated and crude material was purified by column chromatography on silica gel (2 M NH3 in methanol: CH2Cl2, 5:95) to obtain compound 120 (0.4 g, 60%) as a yellow solid in 2:3 ratio of cis-trans diastereomers. 1H NMR (DMSO-d6) δ 0.98-1.08 (m, 3H), 1.38-1.56 (m, 11H), 1.68-1.85 (m, 4H), 2.05-2.18 (m, 2H), 3.02-3.17 (m, 3H), 3.70-3.76 (m, 1H), 6.31 (brs, 2H), 6.62-6.67 (m, 1H), 6.96-7.01 (m, 1H), 7.09-7.11 (m, 1H), 7.22-7.30 (m, 2H), 7.60 (d, 1H, J=5.1 Hz), 7.70-7.72 (m, 1H), 10.59, 10.62 (2s, 1H); ESI-MS m/z (%): 467 (MH+, 100).

Provenance & Evidence