Ammonium Chloride → 3-(3-amino-4-fluorophenyl)-7-chloro-1-methyl-3,4-dihydropyrido[4,3-d]pyrimidin-2(1H)-one
反応式
[Cl:1][C:2]1[N:11]=[CH:10][C:9]2[CH2:8][N:7]([C:12]3[CH:17]=[CH:16][C:15]([F:18])=[C:14]([N+:19]([O-])=O)[CH:13]=3)[C:6](=[O:22])[N:5]([CH3:23])[C:4]=2[CH:3]=1.[NH4+].[Cl-]>CO.C1COCC1.[Zn]>[NH2:19][C:14]1[CH:13]=[C:12]([N:7]2[CH2:8][C:9]3[CH:10]=[N:11][C:2]([Cl:1])=[CH:3][C:4]=3[N:5]([CH3:23])[C:6]2=[O:22])[CH:17]=[CH:16][C:15]=1[F:18]参加物
反応物 2
生成物 1
試薬・触媒・溶媒 2
実験手順
By analogy to Example A24, 6-chloro-4-(methylamino)nicotinaldehyde (from Example A24), 4-fluoro-3-nitroaniline and sodium triacetoxy borohydride are combined in glacial acetic acid to give crude 2-chloro-5-((4-fluoro-3-nitrophenylamino)methyl)-N-methylpyridin-4-amine, which is reacted with diphosgene by the procedure of Example A75 to give 7-chloro-3-(4-fluoro-3-nitrophenyl)-1-methyl-3,4-dihydropyrido[4,3-d]pyrimidin-2(1H)-one. Zn Dust is reacted with a suspension of 7-chloro-3-(4-fluoro-3-nitrophenyl)-1-methyl-3,4-dihydropyrido[4,3-d]pyrimidin-2(1H)-one and NH4Cl in MeOH/THF (1:1) to provide 3-(3-amino-4-fluorophenyl)-7-chloro-1-methyl-3,4-dihydropyrido[4,3-d]pyrimidin-2(1H)-one. By analogy to Example A25, 4-methoxybenzylamine and 3-(3-amino-4-fluorophenyl)-7-chloro-1-methyl-3,4-dihydropyrido[4,3-d]pyrimidin-2(1H)-one are combined and heated to 180° C. to provide 7-(4-methoxybenzylamino)-3-(3-amino-4-fluorophenyl)-1-methyl-3,4-dihydropyrido[4,3-d]pyrimidin-2(1H)-one, which is further reacted with trifluoroacetic acid to provide 7-amino-3-(3-amino-4-fluorophenyl)-1-methyl-3,4-dihydropyrido[4,3-d]pyrimidin-2(1H)-one.
出典と根拠
- ORDレコード
- ord-3f4a9ab35b94434da9e39723a01eddb3
- 出典データセット
- uspto-grants-2011_03
- 特許番号
- US07897762B2
反応ノート
読み込み中…