Cesium carbonate → methyl 3-[2-(2,4-difluorophenoxy)-6-oxo-6H-pyrido[1,2-b]pyridazin-5-yl]-4-methoxybenzoate

HRID 1454957노트

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HRID 1454957 반응식
Cl[C:2]1[CH:3]=[CH:4][C:5]2[N:6]([CH:8]=[CH:9][C:10](=[O:24])[C:11]=2[C:12]2[CH:13]=[C:14]([CH:19]=[CH:20][C:21]=2[O:22][CH3:23])[C:15]([O:17][CH3:18])=[O:16])[N:7]=1.C([O-])([O-])=O.[Cs+].[Cs+].[F:31][C:32]1[CH:37]=[C:36]([F:38])[CH:35]=[CH:34][C:33]=1[OH:39]>CN1C(=O)CCC1>[F:31][C:32]1[CH:37]=[C:36]([F:38])[CH:35]=[CH:34][C:33]=1[O:39][C:2]1[CH:3]=[CH:4][C:5]2[N:6]([CH:8]=[CH:9][C:10](=[O:24])[C:11]=2[C:12]2[CH:13]=[C:14]([CH:19]=[CH:20][C:21]=2[O:22][CH3:23])[C:15]([O:17][CH3:18])=[O:16])[N:7]=1

참가 물질

5

반응물 3

HCID 10796Cesium carbonateHCID 1230512,4-DifluorophenolHCID 57531227methyl 3-(2-chloro-6-oxo-6H-pyrido[1,2-b]pyridazin-5-yl)-4-methoxybenzoate

생성물 1

HCID 57531245methyl 3-[2-(2,4-difluorophenoxy)-6-oxo-6H-pyrido[1,2-b]pyridazin-5-yl]-4-methoxybenzoate

시약·촉매·용매 1

HCID 13387N-methyl-2-pyrrolidone용매

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온도
80 °C

실험 절차

To a solution of methyl 3-(2-chloro-6-oxo-6H-pyrido[1,2-b]pyridazin-5-yl)-4-methoxybenzoate (1.05 g, 3.05 mmol) and Cs2CO3 (2.97 g, 9.15 mmol) dissolved in NMP (20 mL) was added 2,4 difluoro phenol (475 mg, 3.66 mmol). The mixture was heated to 80° C. for 1 hr until the reaction was complete via LCMS analysis. The reaction was poured into 500 mL of ice/H2O and the solid precipitate was collected. The crude residue was purified via silica gel chromatography (EtOAc/CH2Cl2, MeOH) to yield the title compound.

후처리

  1. customthe solid precipitate was collected
  2. customThe crude residue was purified via silica gel chromatography (EtOAc/CH2Cl2, MeOH)

출처 및 근거

ORD 기록
ord-0ce05da8e0d7418d92f6486c5635e4d1
출처 데이터셋
uspto-grants-2009_01
특허 번호
US07482345B2

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