Methyl iodide → 6-(4-Bromo-2-chloro-phenylamino)-7-chloro-3-methyl-3H-benzoimidazole-5-carboxylic acid methyl ester

HRID 217075노트

반응식

HRID 217075 반응식
[CH3:1][O:2][C:3]([C:5]1[C:13]([NH:14][C:15]2[CH:20]=[CH:19][C:18]([Br:21])=[CH:17][C:16]=2[Cl:22])=[C:12]([Cl:23])[C:8]2[N:9]=[CH:10][NH:11][C:7]=2[CH:6]=1)=[O:4].[C:24](=O)([O-])[O-].[K+].[K+].IC>CN(C)C=O.CCOC(C)=O>[CH3:1][O:2][C:3]([C:5]1[C:13]([NH:14][C:15]2[CH:20]=[CH:19][C:18]([Br:21])=[CH:17][C:16]=2[Cl:22])=[C:12]([Cl:23])[C:8]2[N:9]=[CH:10][N:11]([CH3:24])[C:7]=2[CH:6]=1)=[O:4]

참가 물질

6

반응물 3

HCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 688177756-(4-Bromo-2-chloro-phenylamino)-7-chloro-3H-benzoimidazole-5-carboxylic acid methyl ester

생성물 1

HCID 688173586-(4-Bromo-2-chloro-phenylamino)-7-chloro-3-methyl-3H-benzoimidazole-5-carboxylic acid methyl ester

시약·촉매·용매 2

HCID 6228Dimethylformamide용매HCID 8857Ethyl Acetate용매

실험 절차

6-(4-Bromo-2-chloro-phenylamino)-7-chloro-3H-benzoimidazole-5-carboxylic acid methyl ester 10dd (0.141 g, 0.34 mmol), potassium carbonate (0.141 g, 1.02 mmol), and iodomethane (0.063 mL, 1.02 mmol) are dissolved in dimethylformamide (3 mL). After 20 hours, the reaction mixture is diluted with EtOAc and washed with water (3×), potassium carbonate, and brine. The organic layer is dried (Na2SO4) and concentrated to a brown oil. The N3 and N1 alkylated regioisomers are separated by flash chromatography (EtOAc). The recovery of the N3 alkylated regioisomer is 20.4 mg (28%). MS ESI (+) m/z 428, 430 (M+, Br pattern) detected.

후처리

  1. washwashed with water (3×), potassium carbonate, and brine
  2. dry with materialThe organic layer is dried (Na2SO4)
  3. concentrationconcentrated to a brown oil
  4. customare separated by flash chromatography (EtOAc)

출처 및 근거

ORD 기록
ord-5c5f1b1db0c5433bb142a960e0b038ba
출처 데이터셋
uspto-grants-2012_06
특허 번호
US08193231B2

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