Water → Methyl 8-chloroimidazo[1,2-A]pyrazine-2-carboxylate

HRID 513212

반응식

HRID 513212 반응식
[Cl:1][C:2]1[C:3]([NH2:8])=[N:4][CH:5]=[CH:6][N:7]=1.C(=O)(O)[O-].[Na+].Br[CH2:15][C:16](=O)[C:17]([O:19][CH3:20])=[O:18].O>C(#N)C>[Cl:1][C:2]1[C:3]2[N:4]([CH:15]=[C:16]([C:17]([O:19][CH3:20])=[O:18])[N:8]=2)[CH:5]=[CH:6][N:7]=1

참가 물질

6

반응물 4

HCID 962WaterHCID 2762242-Amino-3-chloropyrazineHCID 352524Methyl 3-BromopyruvateHCID 516892Sodium Bicarbonate

생성물 1

HCID 71743177Methyl 8-chloroimidazo[1,2-A]pyrazine-2-carboxylate수율 70.7%

시약·촉매·용매 1

HCID 6342Acetonitrile용매

반응 조건

온도
80 °C

실험 절차

To a solution of 3-chloropyrazin-2-amine (52 g, 401 mmol) in acetonitrile (750 mL) under N2 was added sodium bicarbonate (67.4 g, 803 mmol), and then methyl bromopyruvate (97 mL, 803 mmol). The mixture was then heated to 80° C. for 4 hours and then cooled to r.t. The reaction was then diluted water (2200 mL) and stirred for 30 minutes. The resulting solids were filtered, azeotroped with EtOAc (2 L), and dried overnight at 40° C. under vacuum and nitrogen sweep to give the title compound (60 g). LRMS (ESI) calc (M+H)+=212.0. found 212.0

후처리

  1. temperaturecooled to r.t
  2. filtrationThe resulting solids were filtered
  3. customazeotroped with EtOAc (2 L)
  4. customdried overnight at 40° C. under vacuum and nitrogen sweep

출처 및 근거

ORD 기록
ord-32b09f46a1bf42d2b54a87d4ee296622
출처 데이터셋
uspto-grants-2015_08
특허 번호
US09102673B2

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