Methyl morpholine oxide → 7-Chloro-6-[(2r,6s)-2,6-dimethylmorpholin-4-yl]-3-methyl-1,2-benzoxazole-5-carbaldehyde

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Reaction Steps

To the solution of {7-chloro-6-[(2R,6S)-2,6-dimethylmorpholin-4-yl]-3-methyl-1,2-benzoxazol-5-yl}methanol (Intermediate 372, 130 mg, 4.4 mmol) in anhydrous DCM (5 mL), was added NMO (103 mg, 8.8 mmol) and TPAP (31 mg, 0.88 mmol) at 0° C. and allowed to stir for 1 h at room temperature. The reaction mixture was filtered and the solvents were removed under vacuum and the residue was purified over silica gel chromatography column using ethylacetate-pet. ether gradient to give solid. Yield: 35 mg, (27%).

Provenance & Evidence