Methyl iodide → HCID 67076927, compound

Participants

Reaction Steps

To a solution of 1.62 g (5.46 mmol) ((S)-2-Fluoro-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-yl)-carbamic acid tert-butyl ester in 20 ml tetrahydrofurane were added at −75° C. 4.57 g (5.46 mmol) lithium bis(trimethylsilyl)amide (20% in tetrahydrofurane) followed after 10 minutes by 0.34 ml (6.55 mmol) methyliodide. Stirring was continued overnight while the mixture was allowed to warm to room temperature. The solvent was removed by distillation and 300 ml saturated aqueous sodium hydrogensulfate solution was added. Extraction with ethylacetate and chromatography on silicagel with ethylacetate/heptane 2:8 yielded 0.87 g (51%) ((S)-2-fluoro-9-methyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-yl)-carbamic acid tert-butyl ester as white solid, MS m/e (%): 333 (M+Na+, 15), 311 (M+H+, 70), 255 (100).

Provenance & Evidence