Sodium Carbonate → [4-(6'-Isopropylamino-[2,2';4',3'']terpyridin-5''-yl)-phenyl]-(4-isopropyl-piperazin-1-yl)-methanone

Participants

Reaction Steps

To a solution of (4-Isopropyl-piperazin-1-yl)-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-methanone (Intermediate B4) (1.2 eq, 0.162 mmol, 58 mg) and 2M Na2CO3 (2.0 eq, 0.262 mmol, 0.13 ml) in DME (1 ml) are added (5″-Bromo-[2,2′;4′,3″]terpyridin-6′-yl)-isopropyl-amine (Ex. 2.46; step1) (1 eq, 0.131 mmol, 50 mg) and [1,1′-Bis(diphenylphosphino)-ferrocene]dichloropalladium (II), complex with DCM (0.1 eq, 0.0131 mmol, 9.6 mg). The reaction mixture is heated using microwave radiation at 90° C. for 3 hours. The reaction mixture is dissolved in DCM and washed with water. The organic layer is washed with brine, dried over drying agent MgSO4, filtered and the organic solvent is reduced in vacuo. The residue is purified by reverse phase chromatography (Isolute™ C18, 0-20% acetonitrile in water—0.1% TFA). The appropriate fractions by HPLC are combined and concentrated in vacuo. The resulting residue is dissolved in MeOH and loaded onto a SCX-2 cartridge eluting with MeOH and 2M NH3 in MeOH. The methanolic ammonia fractions are combined, concentrated in vacuo and dried under vacuum to afford the title compound; [M+H]+ 521.

Provenance & Evidence