Triethyloxonium tetrafluoroborate → 7-[(2,4-Dichloro-3-fluorophenyl)carbonyl]-3-[4-(methyloxy)-2-pyridinyl]-5,6,7,8-tetrahydro[1,2,4]triazolo[4,3-a]pyrazine

HRID 1889095

반응식

HRID 1889095 반응식
[Cl:1][C:2]1[C:7]([F:8])=[C:6]([Cl:9])[CH:5]=[CH:4][C:3]=1[C:10]([N:12]1[CH2:17][CH2:16][NH:15][C:14](=O)[CH2:13]1)=[O:11].F[B-](F)(F)F.C([O+](CC)CC)C.[CH3:31][O:32][C:33]1[CH:38]=[CH:37][N:36]=[C:35]([C:39]([NH:41][NH2:42])=O)[CH:34]=1>ClCCl>[Cl:1][C:2]1[C:7]([F:8])=[C:6]([Cl:9])[CH:5]=[CH:4][C:3]=1[C:10]([N:12]1[CH2:17][CH2:16][N:15]2[C:39]([C:35]3[CH:34]=[C:33]([O:32][CH3:31])[CH:38]=[CH:37][N:36]=3)=[N:41][N:42]=[C:14]2[CH2:13]1)=[O:11]

참가 물질

5

실험 절차

To a suspension of 4-[(2,4-dichloro-3-fluorophenyl)carbonyl]-2-piperazinone (I37) (0.25 g, 0.859 mmol) in anhydrous Dichloromethane (DCM) (2.147 ml) was added triethyloxonium tetrafluoroborate (0.179 g, 0.945 mmol) and the mixture was stirred overnight at room temperature under argon. The white suspension turned to a solution and 4-(methyloxy)-2-pyridinecarbohydrazide (0.158 g, 0.945 mmol, commercially available from e.g. Matrix Scientific, Anichem or 3B Scientific) was added at once. It was a suspension at first but straight after it changed to a yellow solution. After ½ hour a precipitate formed again. LCMS showed that the major product was the intermediate and very little unreacted starting amide was present.

후처리

  1. customAfter ½ hour a precipitate formed again

출처 및 근거

ORD 기록
ord-5f4f1ee763684027ba4d1777055f5b50
출처 데이터셋
uspto-grants-2013_08
특허 번호
US08501946B2

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