Sarcosine → HCID 178504986, compound

Participants

Reaction Conditions

Reaction Steps

1-(4-Fluoro-benzyl)-4-hydroxy-3-(7-iodo-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-3-yl)-pyrrolo[1,2-b]pyridazin-2-one (Example 9b, 0.257 g, 0.455 mmol), potassium phosphate (tribasic) (0.483 g, 2.28 mmol), copper(I) iodide (0.022 g, 0.11 mmol), sarcosine (0.024 g, 0.273 mmol, and methanesulfonamide (0.433 g, 4.55 mmol) were dissolved in N,N-dimethylformamide (9 mL) at 25° C. The mixture was heated to 100° C. for 6 h, then was allowed to cool to 25° C., diluted with ethyl acetate (10 mL), and filtered through Celite. The filtrate was concentrated in vacuo and the residue was purified by flash column chromatography (Merck silica gel 60, 40-63 μm, 0→10% methanol in dichloromethane) to afford a yellow solid. Sequential trituration of this material with methanol and diethyl ether afforded the desired product, N-{3-[1-(4-fluoro-benzyl)-4-hydroxy-2-oxo-1,2-dihydro-pyrrolo[1,2-b]pyridazin-3-yl]-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-7-yl}-methanesulfonamide (0.113 g, 0.21 mmol, 47% yield) as a yellow solid. 1H NMR (400 MHz, DMSO-d6) δ: 3.08 (3H, s), 5.65 (2H, s), 6.59-6.61 (1H, m), 7.01-7.02 (1H, m), 7.14-7.18 (2H, m), 7.42-7.46 (2H, m), 7.54 (1H, dd, J1=2.3 Hz, J2=8.6 Hz), 7.62 (1H, d, J=2.5 Hz), 7.66 (1H, d, J=8.9 Hz), 7.71 (1H, s), 10.21 (1H, s), 13.66 (1H, s). LC-MS (ESI) calcd for C22H18FN5O6S2 531.07. found 532.10 [M+H+].

Provenance & Evidence