Boron trifluoride etherate → HCID 178459004, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-cyano-1H-imidazole-2-carboxylic acid (4-bromo-2-cyclohex-1-enyl-phenyl)-amide (prepared in Example 11, step (g)) (0.10 g, 0.27 mmol) in 1.5 mL of THF at −40° C. was added 0.15 mL of i-PrMgCl (0.30 mmol, 2 M solution in THF) and the solution was stirred at this temperature for 15 min. The mixture was then cooled to −78° C. and 2,2-dimethyl-oxirane (0.12 mL, 1.3 mmol) was added followed by boron trifluoride etherate (0.044 mL, 0.35 mmol) and t-BuLi (0.41 mL, 0.69 mmol, 1.7 M solution in pentane). After stirring for 30 min at −78° C. the mixture was quenched with satd NH4Cl (10 mL), extracted with EtOAc (2×10 mL) and the organic layer was dried over Na2SO4 and concentrated. The title compound was eluted from a 20-g SPE column with 50% EtOAc/hexanes to give 0.015 g (15%) of a white solid: 1H-NMR (DMSO-d6, 400 MHz): δ 14.25 (s, 1H), 9.71 (s, 1H), 8.33 (s, 1H), 7.84 (d, J=8.2 Hz, 1H), 7.14 (dd, J=8.2, 1.9 Hz, 1H), 7.06 (d, J=1.9 Hz, 1H), 5.74 (s, 1H), 4.63 (t, J=5.2 Hz, 1H), 3.61 (m, 2H), 2.70 (t, J=7.0 Hz, 2H), 2.23-2.11 (m, 4H), 1.76-1.62 (m, 4H). Mass spectrum (ESI, m/z): Calcd. for C21H24N4O2, 365.2 (M+H), found 365.1.

Provenance & Evidence