1,2-Dibromoethane → N-[1-(2-bromoethyl)-3-[5-chloro-2-(difluoromethoxy) phenyl]-1H-pyrazol-4-yl]pyrazolo[1,5-a]pyrimidine-3-carboxamide

HRID 529780ノート

反応式

HRID 529780 の反応式
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([O:25][CH:26]([F:28])[F:27])=[C:6]([C:8]2[C:12]([NH:13][C:14]([C:16]3[CH:17]=[N:18][N:19]4[CH:24]=[CH:23][CH:22]=[N:21][C:20]=34)=[O:15])=[CH:11][NH:10][N:9]=2)[CH:7]=1.C([O-])([O-])=O.[Cs+].[Cs+].[Br:35][CH2:36][CH2:37]Br>O1CCCC1>[Br:35][CH2:36][CH2:37][N:10]1[CH:11]=[C:12]([NH:13][C:14]([C:16]2[CH:17]=[N:18][N:19]3[CH:24]=[CH:23][CH:22]=[N:21][C:20]=23)=[O:15])[C:8]([C:6]2[CH:7]=[C:2]([Cl:1])[CH:3]=[CH:4][C:5]=2[O:25][CH:26]([F:28])[F:27])=[N:9]1

参加物

5

反応物 3

HCID 78391,2-DibromoethaneHCID 10796Cesium carbonateHCID 178522413HCID 178522413、化合物

生成物 1

HCID 118522619N-[1-(2-bromoethyl)-3-[5-chloro-2-(difluoromethoxy) phenyl]-1H-pyrazol-4-yl]pyrazolo[1,5-a]pyrimidine-3-carboxamide収率 58%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

反応条件

温度
70 °C

実験手順

A mixture of N-[3-[5-chloro-2-(difluoromethoxy)phenyl]-1H-pyrazol-4-yl]pyrazolo[1,5-a]pyrimidine-3-carboxamide (3.00 g, 7.41 mmol), Cs2CO3 (9.90 g, 30.38 mmol), tetrahydrofuran (90 mL), 1,2-dibromoethane (7.00 g, 37.26 mmol) was stirred at 70° C. for 3 hours in an oil bath. The mixture was allowed to cool to ambient temperature then concentrated under reduced pressure. The residue was purified by flash chromatography on silica eluting with ethyl acetate/petroleum ether (1:1) to afford N-[1-(2-bromoethyl)-3-[5-chloro-2-(difluoromethoxy)phenyl]-1H-pyrazol-4-yl]pyrazolo[1,5-a]-pyrimidine-3-carboxamide as a off-white solid (2.2 g, 58%). TLC: Rf=0.6; ethyl acetate/petroleum ether=1:1; LCMS (Method 14) [M+H]+=513.2, RT=1.03 min.

後処理

  1. temperatureto cool to ambient temperature
  2. concentrationthen concentrated under reduced pressure
  3. customThe residue was purified by flash chromatography on silica eluting with ethyl acetate/petroleum ether (1:1)

出典と根拠

ORDレコード
ord-5c94be499ecf402bbab6201a59dc2303
出典データセット
uspto-grants-2016_05
特許番号
US09346815B2

反応ノート

読み込み中…