Dimethylformamide → HCID 57813670, compound

Participants

Reaction Conditions

Reaction Steps

A stirred mixture of the crude trifluoro-methanesulfonic acid 7-(5-cyano-pyridin-2-yl)-2-(3-ethyl-ureido)-benzothiazol-5-yl ester (108 mg, 0.23 mmol), 3-pyridineboronic acid (56 mg, 0.46 mmol), aqueous caesium carbonate (0.155 ml, 0.57 mmol, 3.7M), dimethylformamide (2.4 ml) and water (0.4 ml) was purged with nitrogen for 15 min. treated with tetrakistriphenylphosphine palladium (0) (27 mg, 0.023 mmol), sealed and heated at 80° C. for 8 h. After cooling to ambient temperature, the mixture was filtered through celite and washed through with methanol. The filtrate was evaporated in vacuo to give the crude 1-[7-(5-Cyano-pyridin-2-yl)-5-pyridin-3-yl-benzothiazol-2-yl]-3-ethyl-urea as a brown solid.

Provenance & Evidence