Benzo[b]furan-2-boronic acid → HCID 67299252, compound

Participants

Reaction Steps

To a degassed solution of 3-[(4-Chloro-2,5-dimethyl-benzenesulfonyl)-(3-iodo-benzyl)-amino]-5-phenyl-thiophene-2-carboxylic acid methyl ester (110 mg, 0.169 mmol) and benzofuran-2-boronic acid (55 mg, 0.185 mmol) in a mixture of DME (8 mL) and 2M aqueous Na2CO3 (4 mL), Pd(PPh3)4 (9 mg) was added and the reaction mixture was stirred at reflux conditions for 2 h under a N2 atmosphere. The reaction mixture was diluted with ethyl acetate and water. The organic layer was separated, dried (Na2SO4) and concentrated. 3-[(3-Benzofuran-2-yl-benzyl)-(4-chloro-2,5-dimethyl-benzenesulfonyl)-amino]-5-phenyl-thiophene-2-carboxylic acid methyl ester (107 mg, 100%) was isolated as a thick syrup and used for the next reaction without any further purification.

Provenance & Evidence