Potassium Carbonate → HCID 57941526, compound

Participants

Reaction Steps

A mixture of 2-(3-iodo-phenyl)-1,7,8,8-tetramethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (Example 23; 80 mg, 0.2 mmol), 2-acetyl-phenyl-boronic acid (49 mg, 0.29 mmol), potassium carbonate (66 mg, 0.47 mmol) and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (10 mg, 0.014 mmol) in dimethoxyethane (4 mL) was sealed under argon and heated at 80 degrees overnight and then at 90 degrees over the weekend. The reaction mixture was diluted with dichloromethane, filtered through a cotton plug and frit, evaporated, and purified using an Analogix Intelliflash 280 system (Analogix, Inc., Burlington, Wis.) with an RS-12 column, eluting with 0-80% ethyl acetate/hexanes to give (4S,7R)-2-(2′-acetyl-biphenyl-3-yl)-1,7,8,8-tetramethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one and unreacted starting material (40 mg, 50%). The product was further purified by preparative HPLC (Gilson 215 collector, Shimadzu prep HPLC system, Leap autoinjector. Solvent (A) 0.05% TFA/H2O (B) 0.035% TFA/ACN, using a linear gradient of 20-80% solvent B in 10 minutes, with a C-18 column, 2.0×10 cm eluting at 20 ml/min and UV-directed collection) followed by lyophilization to give (4S,7R)-2-(2′-acetyl-biphenyl-3-yl)-1,7,8,8-tetramethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (9 mg, 11%) as a white solid. ES(+)-MS (M+H) 401.

Provenance & Evidence