Cesium carbonate → tert-Butyl 3-(3-(aminocarbonyl)-5-ethyl-4-{[(5-iodo-2-propoxy-3-Pyridinyl)carbonyl]amino}-1H-pyrazol-1-yl)-1-azetidinecarboxylate

Participants

Reaction Conditions

Reaction Steps

Cesium carbonate (3.59 mmol) was added to a stirred solution of the product from stage b) (1.79 mmol) and the product from stage c) (2.15 mmol) in N,N-dimethylformamide (10 ml) under a nitrogen atmosphere. The mixture was heated at 80° C. for 24 h. The mixture was cooled and extracted from water with ethyl acetate. The organics were dried (MgSO4) and concentrated to give a brown oil. Purification by flash column chromatography (gradient elution from 100% dichloromethane to 90% dichloromethane/MeOH) gave the title product; 1H NMR (400 MHz, DMSO): δ=0.95 (t, 3H), 1.05 (t, 3H), 1.40 (s, 9H), 1.78-1.88 (m, 2H), 2.68 (q, 2H), 4.22-4.35 (m, 4H), 4.40 (t, 2H), 5.3 1H), 7.35 (bs, 1H), 7.52 (bs, 1H), 8.40 (s, 1H), 8.55 (s, 1H), 10.10 (s, 1H); LRMS (TSP—positive ion) 373.2 (MH+—BOC and I); Anal. Found C, 45.11; H, 5.07; N, 13.56 Calcd for C23H31O5N6I. 0.2 DCM: C, 45.28;H, 5.14; N, 13.66.

Provenance & Evidence