Ethyl Acetate → 5-(3-chlorophenyl)-1-(4-methoxybenzyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine

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To a stirred solution of 5-bromo-1-(4-methoxybenzyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine (7) (100 mg, 0.301 mmol, 1 eq) and 2-(3-chlorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (95) (71 mg, 0.301 mmol, 1 eq) in 1,2-dimethoxyethane (10 mL) was added Cs2CO3 (244 mg, 0.752 mmol, 25 eq) 2M aqueous solution followed by degassing, purging with N2 for 15 min and addition of Pd(PPh3)4 (13 mg, 0.012 mmol, 0.04 eq). The reaction mixture was heated at 100° C. in a sealed tube overnight. After completion of the reaction the mixture was partitioned between ethyl acetate and water and the organic layer was separated and again extracted with ethyl acetate. The combined organic layers were dried over sodium sulphate and the solvent completely distilled off to get the crude. The crude was passed through 100-200 mesh silica gel eluting the pure compound at 50% ethyl acetate in hexane as off-white coloured solid compound 96 (60 mg).

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