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Trifluoroacetic acid → 3-(4,5-Dibromo-3-chloro-thiophen-2-yl)-8-(1-ethyl-propyl)-2,6-dimethyl-imidazo[1,2-b]pyridazine

HRID 1432715
ノート
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反応式

HRID 1432715 の反応式
[Br:1][C:2]1[S:6][C:5]([C:7]2[N:11]3[N:12]=[C:13]([CH3:21])[CH:14]=[C:15]([CH:16]([CH2:19][CH3:20])[CH2:17][CH3:18])[C:10]3=[N:9][C:8]=2[CH3:22])=[C:4]([Cl:23])[CH:3]=1.FC(F)(F)C(O)=O.C1C(=O)N([Br:38])C(=O)C1.[OH-].[Na+]>OS(O)(=O)=O>[Br:38][C:3]1[C:4]([Cl:23])=[C:5]([C:7]2[N:11]3[N:12]=[C:13]([CH3:21])[CH:14]=[C:15]([CH:16]([CH2:19][CH3:20])[CH2:17][CH3:18])[C:10]3=[N:9][C:8]=2[CH3:22])[S:6][C:2]=1[Br:1]
参加物実験手順後処理出典と根拠反応ノート

参加物

6

反応物 4

HCID 6422Trifluoroacetic acidHCID 14798Sodium HydroxideHCID 67184N-bromobutanimideHCID 579329223-(5-Bromo-3-chloro-thiophen-2-yl)-8-(1-ethyl-propyl)-2,6-dimethyl-imidazo[1,2-b]pyridazine

生成物 1

HCID 579330503-(4,5-Dibromo-3-chloro-thiophen-2-yl)-8-(1-ethyl-propyl)-2,6-dimethyl-imidazo[1,2-b]pyridazine収率 94%

試薬・触媒・溶媒 1

HCID 1118Sulfuric Acid溶媒

実験手順

To a solution of 3-(5-bromo-3-chloro-thiophen-2-yl)-8-(1-ethyl-propyl)-2,6-dimethyl-imidazo[1,2-b]pyridazine (5.92 g, 14.34 mmol) and trifluoroacetic acid (40 mL) and 98% H2SO4 (10 ml) is added NBS (3.83 g, 21.15 mmol). After 10 minutes the solution is poured into ice, and made basic with 5M NaOH. The slurry is extracted with EtOAc (3×100 mL), the combined organic layers washed with water (2×400 mL), brine (400 mL), dried over MgSO4, filtered and concentrated to furnish the title compound (6.61 g, 13.44 mmol, 94%). 1H NMR (CDCl3) δ 0.87 (t, J=7.5 Hz, 6H), 1.72-1.92 (m, 4H), 2.47 (s, 3H), 2.52 (s, 3H), 3.25-3.34 (m, 1H), 6.72 (s, 1H). LC/MS (m/z): calcd. for C17H18Br2ClN3S (M+H)+: 489.9; found: 490.0.

後処理

  1. additionAfter 10 minutes the solution is poured into ice
  2. extractionThe slurry is extracted with EtOAc (3×100 mL)
  3. washthe combined organic layers washed with water (2×400 mL), brine (400 mL)
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated

出典と根拠

ORDレコード
ord-50136b62c9974bb5b1cdde7febe23637
出典データセット
uspto-grants-2009_11
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US07612067B2

反応ノート

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