Triethylamine → (3-(3-Amino-2,6-difluorobenzoyl)-5-bromo-1H-pyrrolo[2,3-b]pyridin-1-yl)(2,6-dichlorophenyl)methanone

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Reaction Conditions

Reaction Steps

Compound 4 (2.5 kg, 7.114 mol) obtained from Example 2 was added into a 50-liter flask and cooled to 9.3° C. To compound 4 in the 50-liter flask was added triethylamine (0.864 kg, 8.537 mol), followed by 4-dimethylaminopyridine (DMAP) (0.087 kg, 0.7114 mol) and 2,6-dichlorobenzoyl chloride (1.34 kg, 6.40 mol) in 2-methyl-THF (25 L) over a period of 2 hrs. The reaction was quenched with methanol (0.30 L at room temperature and added an aqueous NaCl solution (12.5 L, 15%) and celite (0.5 kg). The mixture was stirred and filtered through celite. The filtrate was concentrated and added 5 volumes of heptanes. The resulting solution was stirred for about 1 hr and dried with sodium sulfate (1 kg) and filtered. Compound 5 was isolated by removing the solvents under vacuum (3.47 kg, 92.93% yield). MS (ESI): M+H+=524, 525.8, 527.8. 1H NMR (DMSO-d6, δ ppm): 5.36 (2H, s), 7.01 (2H, m), 7.68 (3H, s), 8.34 (1H, brs), 8.61 (1H, brs), 8.72 (1H, d J=2.3 Hz).

Provenance & Evidence