4-Methylmorpholine → HCID 68424784, compound

Participants

Reaction Steps

N-{[4-((2R,3R)-1-(4-Fluorophenyl)-3-{[2-(4-fluorophenyl)-2-oxoethyl]thio}-4-oxoazetidin-2-yl)phenoxy]acetyl}glycine (0.035 g, 0.065 mmol) was dissolved in DMF (2 ml) at 30° C. N-Methyl morpholine (0.026 g, 0.259 mmol) and TBTU (0.027 g, 0.084 mmol) were added. After 1 h, (2R)-amino(cyclopentyl)acetic acid (0.014 g, 0.097 mmol) was added. The mixture was stirred for 1 h and water (1 ml) was added. After 10 minutes, MeOH (2 ml) and NaBH4 (0.037 g, 0.971 mmol) were added. Full conversion to the corresponding alcohol was obtained after 5 minutes. The reaction was quenched by the addition of 0.1M NH4OAc buffer (2 ml). The mixture was purified by preparative HPLC (eluent 0-50% CH3CN in 0.1M NH4OAc buffer). Freeze-drying of the pure fractions gave the title compound (0.018 g, 42%) as a colourless solid. M/z: 666.0 (M−1). 1H NMR [(CD3)2SO), 400 M] δ 1.19-1.62 (m, 8H), 2.09-2.19 (m, 1H), 2.83-2.95 (m, 2H), 3.78 (d, 2H), 4.06-4.10 (m, 1H), 4.25-4.30 (m, 1H), 4.51 (s, 2H), 4.68-4.75 (m, 1H), 5.03-5.06 (m, 1H), 6.97-7.37 (m, 12H), 7.95-8.00 (m, 1H), 8.22 (t, 1H).

Provenance & Evidence