N-bromobutanimide → 3-(4-Bromo-2-fluoro-phenylamino)-5-formylaminomethyl-pyrazine-2-carboxylic acid methyl ester

HRID 2076193ノート

反応式

HRID 2076193 の反応式
[CH3:1][O:2][C:3]([C:5]1[C:10]([NH:11][C:12]2[CH:17]=[CH:16][C:15]([Si](C)(C)C)=[CH:14][C:13]=2[F:22])=[N:9][C:8]([CH2:23][NH:24][CH:25]=[O:26])=[CH:7][N:6]=1)=[O:4].C1C(=O)N([Br:34])C(=O)C1>ClCCl.C(OCC)(=O)C>[CH3:1][O:2][C:3]([C:5]1[C:10]([NH:11][C:12]2[CH:17]=[CH:16][C:15]([Br:34])=[CH:14][C:13]=2[F:22])=[N:9][C:8]([CH2:23][NH:24][CH:25]=[O:26])=[CH:7][N:6]=1)=[O:4]

参加物

5

反応物 2

HCID 67184N-bromobutanimide2 回HCID 59140179HCID 59140179、化合物

生成物 1

HCID 591401763-(4-Bromo-2-fluoro-phenylamino)-5-formylaminomethyl-pyrazine-2-carboxylic acid methyl ester収率 80.1%

試薬・触媒・溶媒 2

HCID 6344Dichloromethane溶媒HCID 8857Ethyl Acetate溶媒

反応条件

温度
-30 °C

実験手順

To a −30° C. solution of 3-(2-fluoro-4-trimethylsilanyl-phenylamino)-5-formylaminomethyl-pyrazine-2-carboxylic acid methyl ester (1.84 g, 4.89 mmol) in dichloromethane (50 mL) under N2 was added NBS (0.96 g, 5.38 mmol, 1.1 eq.), and the reaction mixture was stirred at −30° C. for 3 h. More NBS (0.96 g, 5.38 mmol, 1.1 eq.) was added, and the reaction mixture was allowed to stand at 0° C. for 18 h. The reaction mixture was diluted with ethyl acetate (250 mL). The organic layer was washed with saturated aqueous solution of sodium bicarbonate, water and brine, dried (Na2SO4), filtered and concentrated in vacuo. The crude material was triturated with methanol to afford the desired product as a yellow solid (1.50 g, 80.1%). LCMS (method C): RT=2.51 min, [M+H]+=383/384.

後処理

  1. waitto stand at 0° C. for 18 h
  2. washThe organic layer was washed with saturated aqueous solution of sodium bicarbonate, water and brine
  3. dry with materialdried (Na2SO4)
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe crude material was triturated with methanol

出典と根拠

ORDレコード
ord-f23a568aeb424fe9b01c8c973186f84b
出典データセット
uspto-grants-2011_04
特許番号
US07923456B2

反応ノート

読み込み中…