Hydrochloric Acid → 1-(8-Bromo-4,5-dihydrothiazolo[4,5-d]benzo[b]oxepin-2-yl)-3,5,5-trimethylimidazolidin-2-one

A mixture of 0.254 g (0.65 mmol) of 1-(8-bromo-4,5-dihydrothiazolo[4,5-d]benzo[b]oxepin-2-yl)-5,5-dimethylimidazolidin-2-one from Example 429, and 50.0 mg (1.25 mmol) of 60% sodium hydride dispersion in mineral oil in 2 ml of tetrahydrofuran and 2 ml of dimethylformamide was stirred for 20 min. 0.062 ml (1.00 mmol) of methyl iodide was added in one portion to the above mixture. The mixture was stirred for 30 min and poured into 10 ml of 1 N aq hydrochloric acid. The mixture was extracted with ethyl acetate. The organic extracts were washed with water, brine, dried over magnesium sulfate and concentrated in vacuum. The residue was triturated with hexane and the resulting precipitate was filtered and washed with hexane. Yield 260 mg (98%). MS (ESI+): 408.1

1. extractionThe mixture was extracted with ethyl acetate
2. washThe organic extracts were washed with water, brine
3. dry with materialdried over magnesium sulfate
4. concentrationconcentrated in vacuum
5. customThe residue was triturated with hexane
6. filtrationthe resulting precipitate was filtered
7. washwashed with hexane

ORDレコード

ord-6704dd8f741544c9a6dde5c456276c3d

出典データセット

uspto-grants-2014_03

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08673952B2