Diisopropylethylamine → 1-[3-(3-Fluoro-phenylamino)-6,7-dimethoxy-4H-indeno[1,2-c]pyrazol-1-yl]-2-hydroxy-ethanone

Participants

Reaction Steps

To a mixture of (6,7-Dimethoxy-1,4-dihydro-indeno[1,2-c]pyrazol-3-yl)-(3-fluoro-phenyl)-amine (Compound 14) (3.6 g, 10.0 mmol), Benzyloxy-acetyl chloride (Compound 27a) (2.2 g, 12.0 mmole) and DMF (50 mL) was added Diisopropylethylamine (5.2 mL, 30 mmole) at room temperature with stirring. The reaction was stirred at room temperature over night. The reaction was quenched with water and extracted with EtOAc. Dried over sodium sulfate and removed solvent in vacuo. The crude material was then taken up into ethanol and 0.5 g of Pd/C was added. The reaction was shaken on the hydrogenator over night. The reaction was filtered through Celite and removed solvent in vacuo. Triturated in a small amount of EtOAc. 3.2 g of ˜90% pure material was produced. 300 mg of the crude material was prepped on the Gilson and lyophilization gave Compound 432 as a white powder. MS m/z 384 (M+H)+;

Provenance & Evidence