Benzo(B)Thiophene-2-Boronic Acid → 3-benzo[b]thiophen-2-yl-1-perhydro-2H-pyran-2-yl-1H-indazole-5-carboxamide

Participants

Reaction Steps

A mixture of 3-bromo-1-perhydro-2H-pyran-2-yl-1H-indazole-5-carboxamide (425 mg, 1.31 mmol), benzo[b]thiophene-2-boronic acid (348 mg, 1.95 mmol, 1.49 equiv.), [1,1′-bis(diphenylphosphino)-ferrocene}dichloropalladium (II) complex with dichloromethane (107 mg, 0.131 mmol, 0.10 equiv.), potassium phosphate (K3PO4, 1.38 g, 6.50 mmol, 4.96 equiv.) and 6.5 mL of DME were refluxed for 18 h and concentrated. Purification by silica gel chromatography using 0–5% MeOH in EtOAc as eluent afforded the title compound (126 mg, 26% yield): ES-MS (m/z) 378 [M+1]+.

Provenance & Evidence