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N-bromobutanimide → 8-bromo-10a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one

HRID 1753145
ノート
印刷プレビュー

反応式

HRID 1753145 の反応式
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]23[NH:20][CH2:19][CH2:18][N:9]2[C:10](=[O:17])[C:11]2[N:12]([CH:14]=[CH:15][CH:16]=2)[CH2:13]3)=[CH:4][CH:3]=1.[Br:21]N1C(=O)CCC1=O>C1COCC1>[Br:21][C:15]1[CH:16]=[C:11]2[C:10](=[O:17])[N:9]3[CH2:18][CH2:19][NH:20][C:8]3([C:5]3[CH:6]=[CH:7][C:2]([Cl:1])=[CH:3][CH:4]=3)[CH2:13][N:12]2[CH:14]=1.[Br:21][C:14]1[N:12]2[CH2:13][C:8]3([C:5]4[CH:6]=[CH:7][C:2]([Cl:1])=[CH:3][CH:4]=4)[NH:20][CH2:19][CH2:18][N:9]3[C:10](=[O:17])[C:11]2=[CH:16][CH:15]=1
参加物実験手順後処理出典と根拠反応ノート

参加物

5

反応物 2

HCID 67184N-bromobutanimideHCID 6736965310a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one

生成物 2

HCID 584063618-bromo-10a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-oneHCID 584063827-bromo-10a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one

試薬・触媒・溶媒 1

HCID 8028
Tetrahydrofuran
溶媒

実験手順

To a solution of 10a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one (100 mg, 0.35 mmol) dissolved in THF (20 mL) was added N-bromosuccinimide (62 mg, 0.35 mmol) and the reaction mixture was stirred at room temperature for 1 h. LCMS analysis showed a mixture of mono brominated product (366/368 m/z), a small amount of dibrominated pyrrole (446 m/z) and debrominated starting material (288 m/z). The reaction mixture was partitioned with water (25 ml) and CH2CL2 (25 mL) and the organic layer was separated and concentrated in vacuo to give crude product (light yellow oil). The crude mixture was then purified using flash chromatography (Biotage SP4, 12 g cartridge, 0-10% MeOH gradient in CH2Cl2) to give 7-bromo-10a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one (A) and 8-bromo-10a-(4-chlorophenyl)-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one (B) in a 0.6:1 ratio (98.4 mg, yield 77%). The mixture was used without further purification in the next step.

後処理

  1. additiona mixture
  2. customThe reaction mixture was partitioned with water (25 ml) and CH2CL2 (25 mL)
  3. customthe organic layer was separated
  4. concentrationconcentrated in vacuo
  5. customto give crude product (light yellow oil)
  6. customThe crude mixture was then purified

出典と根拠

ORDレコード
ord-822e8c676e3a4eb0871f20c76bbdc578
出典データセット
uspto-grants-2015_10
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09163029B2

反応ノート

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