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Dimethylformamide → 6-(5,7-Dichloro-2,3-dihydro-1h-indol-1-yl)-4-(1-ethylpropyl)-4,5-dihydro-5-oxo-2-pyrazinecarbonitrile

HRID 2251047
ノート
印刷プレビュー

反応式

HRID 2251047 の反応式
Br[C:2]1[N:3]=[C:4]([N:14]2[C:22]3[C:17](=[CH:18][C:19]([Cl:24])=[CH:20][C:21]=3[Cl:23])[CH2:16][CH2:15]2)[C:5](=[O:13])[N:6]([CH:8]([CH2:11][CH3:12])[CH2:9][CH3:10])[CH:7]=1.[CH3:25][N:26](C)C=O>O.[C-]#N.[Zn+2].[C-]#N.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[Cl:24][C:19]1[CH:18]=[C:17]2[C:22](=[C:21]([Cl:23])[CH:20]=1)[N:14]([C:4]1[C:5](=[O:13])[N:6]([CH:8]([CH2:11][CH3:12])[CH2:9][CH3:10])[CH:7]=[C:2]([C:25]#[N:26])[N:3]=1)[CH2:15][CH2:16]2
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

6

反応物 2

HCID 6228DimethylformamideHCID 102246635-Bromo-3-(5,7-dichloro-2,3-dihydro-1H-indol-1-yl)-1-(1-ethylpropyl)-2(1H)-pyrazinone

生成物 1

HCID 99698106-(5,7-Dichloro-2,3-dihydro-1h-indol-1-yl)-4-(1-ethylpropyl)-4,5-dihydro-5-oxo-2-pyrazinecarbonitrile収率 21%

試薬・触媒・溶媒 3

HCID 11186Zinc cyanide (Zn(CN)2)触媒
HCID 178418397
HCID 178418397、化合物
触媒
HCID 962Water溶媒

反応条件

温度
175 °C

実験手順

A solution of 5-bromo-3-(5,7-dichloro-2,3-dihydro-1H-indol-1-yl)-1-(1-ethylpropyl)-2(1H)-pyrazinone (Example 507) (100 mg, 0.23 mmol), zinc cyanide (32 mg, 0.28 mmol), and tetrakis(triphenylphosphine)palladium(0) (32 mg, 25 μmol) in dimethylforamide (3 ml) was degassed with nitrogen and heated to 175° C. in a microwave for 5 min. The reaction mixture was diluted with water (5 mL) and extracted with ethyl acetate (5 mL×2). The combined organic extracts were dried (MgSO4), filtered, and concentrated in vacuo to give a crude residue. Purification by HPLC (reverse phase C18, 95% water in acetonitrile containing 0.1% trifluroacetic acid to 5% water in acetonitrile containing 0.1% trifluroacetic acid, flow rate 18 ml/min, retention time 38.4 min) gave the product (18 mg, 21%) as a yellow solid. mp 197-199° C.; 1H NMR (300 MHz, CDCl3): δ 7.27 (s, 1 H), 7.19 (d, J=2.2 Hz, 1H), 7.14 (d, J=1.8 Hz, 1 H), 4.82-4.77 (m, 1 H), 4.33 (t, J=7.9 Hz, 2 H), 3.15 (t, J=7.7 Hz, 2 H), 1.92-1.78 (m, 2 H), 1.75-1.60 (m, 2 H), 0.89 (t, J=7.3 Hz, 6 H); HRMS (ESI) calcd for C18H19N4OCl2 (M+H)+: 377.0936; Found m/z 377.0910.

後処理

  1. extractionextracted with ethyl acetate (5 mL×2)
  2. dry with materialThe combined organic extracts were dried (MgSO4)
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customto give a crude residue
  6. customPurification by HPLC (reverse phase C18, 95% water in acetonitrile containing 0.1% trifluroacetic acid to 5% water in acetonitrile containing 0.1% trifluroacetic acid, flow rate 18 ml/min, retention time 38.4 min)

出典と根拠

ORDレコード
ord-251e447c0a864dd1a30d382ec931c494
出典データセット
uspto-grants-2008_01
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US07319100B2

反応ノート

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