Water → 4-Chloro-5-(2-methoxy-5-nitro-phenyl)-1-methyl-1H-pyrazole

HRID 407415ノート

反応式

HRID 407415 の反応式
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([N+:9]([O-:11])=[O:10])=[CH:5][C:4]=1[C:12]1[N:16]([CH3:17])[N:15]=[CH:14][CH:13]=1.[Cl:18]N1C(=O)CCC1=O.O>CN(C=O)C>[Cl:18][C:13]1[CH:14]=[N:15][N:16]([CH3:17])[C:12]=1[C:4]1[CH:5]=[C:6]([N+:9]([O-:11])=[O:10])[CH:7]=[CH:8][C:3]=1[O:2][CH3:1]

参加物

5

反応物 3

HCID 962WaterHCID 31398Chlorosuccinimide2 回HCID 231395315-(2-Methoxy-5-nitrophenyl)-1-methyl-1H-pyrazole

生成物 1

HCID 231395374-Chloro-5-(2-methoxy-5-nitro-phenyl)-1-methyl-1H-pyrazole収率 89%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
80 °C

実験手順

5-(2-Methoxy-5-nitro-phenyl)-1-methyl-1H-pyrazole (2.37 g, 10.17 mmol) was dissolved in DMF (100 mL). The solution was then heated to 80° C. N-Chlorosuccinimide (1.49 g, 11.1 mmol) was added at 80° C. under Argon gas. After two hours of continuous stirring, the reaction was checked by TLC and LCMS, and found to be incomplete. An additional aliquot of NCS (0.5 g, 3.7 mmol) was added, bringing the reaction to completion after 1.5 hours. While stirring, a portion of water (200 mL) was added to force the product to precipitate out of solution. After the precipitation was complete, the flask containing the solid was cooled in an ice water bath for 10 minutes. The solid was then filtered under vacuum and rinsed with water, yielding 2.4 g (89%) of 4-chloro-5-(2-methoxy-5-nitro-phenyl)-1-methyl-1H-pyrazole. This material was used in the next step without purification. LCMS m/z (%)=267 (M+H, 100). 1H NMR (400 MHz, CDCl3) δ: 8.41 (dd, J1=8 Hz, J2=4 Hz, 1H), 8.22 (d, J=4 Hz, 1H), 7.53 (s, 1H), 7.14 (d, J=12 Hz, 1H), 3.97 (s, 3H), 3.72 (s, 3H).

後処理

  1. customthe reaction to completion after 1.5 hours
  2. customto precipitate out of solution
  3. customAfter the precipitation
  4. additionthe flask containing the solid
  5. temperaturewas cooled in an ice water bath for 10 minutes
  6. filtrationThe solid was then filtered under vacuum
  7. washrinsed with water

出典と根拠

ORDレコード
ord-f4205f65d9144292bbca65ccd3a45e73
出典データセット
uspto-grants-2014_06
特許番号
US08754238B2

反応ノート

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