1H-1,2,4-Triazole → 6-((2R,6R)-2,6-dimethylmorpholino)-7-fluoro-3-(1H-1,2,4-triazol-1-yl)benzo[d]isoxazole-5-carbaldehyde

Participants

Reaction Steps

Sodium hydride (60% dispersion) (0.288 g, 7.19 mmol) was added to a solution of 1H-1,2,4-triazole (0.530 g, 7.67 mmol) and 3-chloro-6-((2R,6R)-2,6-dimethylmorpholino)-7-fluorobenzo[d]isoxazole-5-carbaldehyde (Intermediate 535, 1.5 g, 4.80 mmol) in DMF (10 ml), and the mixture was stirred at room temperature overnight. The mixture was quenched with aqueous NH4Cl and diluted with water before being extracted with CH2Cl2 5 times. The combined extracts were dried (MgSO4) and concentrated to give a solid that was taken up in CH2Cl2. Insoluble solids were filtered off and rinsed with additional CH2Cl2. The solids were dried in vacuo and were consistent with desired product. The filtrate was concentrated and chromatographed on silica gel (100% CH2Cl2 followed by gradient elution to 50% EtOAc in CH2Cl2) to give additional desired product. Total of 866 mg.

Provenance & Evidence