Triethylamine → 2-[4-bromo-1-(3-chloro-2-pyridinyl)-1H-imidazol-2-yl]-6,8-dibromo-4H-3,1-benzoxazine-4-one

To a solution of 0.50 g of 1-[4-bromo-1-(3-chloro-2-pyridinyl)-1H-imidazol-2-yl]-2,2,2-trichloroethanone and 0.37 g of 2-amino-3,5-dibromobenzoic acid in 10 ml of acetonitrile was added 0.43 ml of triethylamine. The resulting mixture was stirred at room temperature for 1 day. Thereto 0.12 ml of methanesulfonyl chloride was added, and the mixture was stirred at room temperature for 3 hours. Water was poured into the reaction mixture, and the mixture was extracted with ethyl acetate three times. The organic layers were combined, washed with an aqueous saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to obtain 0.29 g of 2-[4-bromo-1-(3-chloro-2-pyridinyl)-1H-imidazol-2-yl]-6,8-dibromo-4H-3,1-benzoxazine-4-one of the formula:

1. stirringthe mixture was stirred at room temperature for 3 hours
2. extractionthe mixture was extracted with ethyl acetate three times
3. washwashed with an aqueous saturated sodium chloride solution
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated under reduced pressure

ORD 기록

ord-e4034f01c41c4b57a8e443038696ade1

출처 데이터셋

uspto-grants-2011_06

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US07968573B2