N-(3-chloro-4-fluorophenyl)-N-(2-methyl-5-nitrophenyl)pyrimidine-4,6-diamine → N-(5-amino-2-methylphenyl)-N-(3-chloro-4-fluorophenyl)pyrimidine-4,6-diamine

HRID 2093492ノート

反応式

HRID 2093492 の反応式
[Cl:1][C:2]1[CH:3]=[C:4]([N:9]([C:17]2[CH:22]=[C:21]([N+:23]([O-])=O)[CH:20]=[CH:19][C:18]=2[CH3:26])[C:10]2[CH:15]=[C:14]([NH2:16])[N:13]=[CH:12][N:11]=2)[CH:5]=[CH:6][C:7]=1[F:8]>CC(O)=O.CO.[Fe]>[NH2:23][C:21]1[CH:20]=[CH:19][C:18]([CH3:26])=[C:17]([N:9]([C:4]2[CH:5]=[CH:6][C:7]([F:8])=[C:2]([Cl:1])[CH:3]=2)[C:10]2[CH:15]=[C:14]([NH2:16])[N:13]=[CH:12][N:11]=2)[CH:22]=1

参加物

5

反応物 1

HCID 66769443N-(3-chloro-4-fluorophenyl)-N-(2-methyl-5-nitrophenyl)pyrimidine-4,6-diamine

生成物 1

HCID 66769431N-(5-amino-2-methylphenyl)-N-(3-chloro-4-fluorophenyl)pyrimidine-4,6-diamine収率 22.3%

試薬・触媒・溶媒 3

HCID 23925Iron触媒HCID 176Acetic Acid溶媒HCID 887Methanol溶媒

実験手順

Synthesis of N-(5-Amino-2-methylphenyl)-N′-(3-chloro-4-fluorophenyl)-pyrimidine-4,6-diamine (Int-F) A mixture of 4-(3-chloro-4-fluorophenyl)-6-chloropyrimidin-4-ylamine (IR-4) (1.2 g, 4.6 mmol), 2-methyl-5-nitroaniline (0.85 g, 5.5 mmol) and 1 mL of concentrated HCl in 10 mL of n-butanol was heated at 120° C. for 16 h. With stifling, 5 mL of EtOAc was added to the reaction mixture. The light yellow colored product that precipitated was filtered and dried under vacuum to give N-(3-chloro-4-fluorophenyl)-N-(2-methyl-5-nitrophenyl)pyrimidine-4,6-diamine. MS (APCI) (m/z): 374/376 (M+1). A mixture of N-(3-chloro-4-fluorophenyl)-N-(2-methyl-5-nitrophenyl)pyrimidine-4,6-diamine (0.55 g, 1.5 mmol) and iron powder (35 mesh, 0.5 g, 5 eq) in 5 mL of HOAc and 2 mL of MeOH was heated at reflux for 2 h. The solvent was removed in vacuo and the dark colored residue was mixed with 150 mL of CH2Cl2 and 15 mL of sat. K2CO3 solution and was stirred at room temperature for 30 min. The organic layer was dried (MgSO4), was concentrated, and was then purified by flash chromatography (silica gel, MeOH/NH4OH/CH2Cl2) to afford 0.115 g of N-(5-amino-2-methylphenyl)-N-(3-chloro-4-fluorophenyl)pyrimidine-4,6-diamine as a light colored solid. (Int-F) MS (m/z): 344/346 (M+1).

後処理

  1. temperaturewas heated
  2. temperatureat reflux for 2 h
  3. customThe solvent was removed in vacuo
  4. additionthe dark colored residue was mixed with 150 mL of CH2Cl2 and 15 mL of sat. K2CO3 solution
  5. dry with materialThe organic layer was dried (MgSO4)
  6. concentrationwas concentrated
  7. customwas then purified by flash chromatography (silica gel, MeOH/NH4OH/CH2Cl2)

出典と根拠

ORDレコード
ord-37be2955854042a7a6e21dcf27486996
出典データセット
uspto-grants-2013_05
特許番号
US08445498B2

反応ノート

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