Morpholine → 1-{[(R)-5-(4-Cyano-benzyl)-7-(3,5-dichloro-4-fluoro-phenyl)-5-methyl-6-oxo-6,7-dihydro-5H-imidazo[1,2-a]imidazole-3-carbonyl]-amino}-cyclopropanecarboxylic acid

Participants

Reaction Steps

The ester obtained (12.6 g, 22 mmol) was combined with THF (100 mL). Morpholine (18.6 mL, 210 mmol) and Pd(PPh3)4 (500 mg, 0.40 mmol) were added and the reaction was allowed to stir at room temperature for 16 h. The solution was filtered through diatomaceous earth and then concentrated. The residue was diluted with ethyl acetate (150 mL) washed with water (2×50 mL), 1M HCl (2×50 mL), brine (1×50 mL) and then dried (MgSO4), filtered and concentrated. The residue was purified by flash chromatography (silica-gel) using 10-100% ethyl acetate in hexanes to provide 10.4 g of the title compound.

Provenance & Evidence