Sodium Carbonate → 1-(cyclopropylmethyl)-6-(3,4,5-trimethoxyphenyl)-1H-imidazo[4,5-b]pyridin-2(3H)-one

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Reaction Conditions

Reaction Steps

Intermediate 5 from Example 124 was alkylated with (bromomethyl)cyclopropane using K2CO3 in acetone, after which it was deprotected using TFA/CH2Cl2. To the resulting 6-bromo-1-(cyclopropylmethyl)-1H-imidazo[4,5-b]pyridin-2(3H)-one in CH3CN (1 mL) in a microwave reaction vial was added 3,4,5-trimethoxyphenylboronic acid (30 mg, 0.14 mmol), bis(triphenylphosphine)-palladium(II) dichloride (7.0 mg, 0.010 mmol), and 1 M Na2CO3 (1 mL). The resulting mixture was de-gassed with Ar for 10 min, after which it was heated at 150° C. for 10 min in a Personal Chemistry Optimizer. The resulting mixture was partitioned between EtOAc and 1 M NaOH. The organic layer was separated, dried over MgSO4, filtered, and stripped to give a residue that was purified via preparatory HPLC to give 3.7 mg of the title compound. HPLC retention time: 1.90 minutes; MS ESI (m/z): 356.2 (M+1)+, calc. 355.

Provenance & Evidence