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Boron tribromide → 5-(1H-pyrazol-1-yl)-2-(6-(1,2,3,6-tetrahydropyridin-4-yl)pyridazin-3-yl)phenol

HRID 1027196
ノート
印刷プレビュー

反応式

HRID 1027196 の反応式
C[O:2][C:3]1[CH:8]=[C:7]([N:9]2[CH:13]=[CH:12][CH:11]=[N:10]2)[CH:6]=[CH:5][C:4]=1[C:14]1[N:19]=[N:18][C:17]([C:20]2[CH2:25][CH2:24][N:23](C(OC(C)(C)C)=O)[CH2:22][CH:21]=2)=[CH:16][CH:15]=1.B(Br)(Br)Br>C(Cl)Cl>[N:9]1([C:7]2[CH:6]=[CH:5][C:4]([C:14]3[N:19]=[N:18][C:17]([C:20]4[CH2:25][CH2:24][NH:23][CH2:22][CH:21]=4)=[CH:16][CH:15]=3)=[C:3]([OH:2])[CH:8]=2)[CH:13]=[CH:12][CH:11]=[N:10]1
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

4

反応物 2

HCID 25134Boron tribromideHCID 86710593tert-Butyl 4-(6-(2-methoxy-4-(1H-pyrazol-1-yl)phenyl)pyridazin-3-yl)-5,6-dihydropyridine-1(2H)-carboxylate

生成物 1

HCID 1363771455-(1H-pyrazol-1-yl)-2-(6-(1,2,3,6-tetrahydropyridin-4-yl)pyridazin-3-yl)phenol収率 25%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒2 回

反応条件

温度
-78 °C

実験手順

tert-Butyl 4-(6-(2-methoxy-4-(1H-pyrazol-1-yl)phenyl)pyridazin-3-yl)-5,6-dihydropyridine-1(2H)-carboxylate (50 mg, 0.12 mmol) was dissolved in DCM (0.6 mL). The solution was cooled to −78° C. and 1 M BBr3 in DCM (0.6 mL) was added dropwise. The resulting suspension was removed from the ice bath and stirred at RT overnight. The reaction was quenched with water, diluted with MeOH then adsorbed onto a MeOH conditioned SCX column. The column was washed several times (5-7 column volumes) with MeOH then eluted with 2 N NH3 in MeOH to provide the desired product, 5-(1H-pyrazol-1-yl)-2-(6-(1,2,3,6-tetrahydropyridin-4-yl)pyridazin-3-yl)phenol, (9.7 mg, 0.03 mmol, 25% yield). LCMS Rt=0.49 min, M+1=320.1 (LCMS method Q). 1H NMR (DMSO-d6) δ 8.64 (d, J=2.3 Hz, 1H), 8.52 (d, J=9.5 Hz, 1H), 8.19 (dd, J=9.0, 3.0 Hz, 2H), 7.80 (d, J=1.3 Hz, 1H), 7.43-7.61 (m, 2H), 6.89-7.03 (m, 1H), 6.52-6.66 (m, 1H), 3.56-3.73 (m, 2H), 3.02-3.15 (m, 2H), 2.66-2.74 (m, 2H).

後処理

  1. customThe resulting suspension was removed from the ice bath
  2. customThe reaction was quenched with water
  3. additiondiluted with MeOH
  4. washThe column was washed several times (5-7 column volumes) with MeOH
  5. washthen eluted with 2 N NH3 in MeOH

出典と根拠

ORDレコード
ord-5d604b8c7d834554b05446731d82d332
出典データセット
uspto-grants-2014_05
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08729263B2

反応ノート

読み込み中…

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