Triethylamine → Methyl 2-(6-cyano-5-(2,4-dichlorophenyl)-7-methylimidazo[1,2-a]pyrimidin-2-yl)acetate

HRID 1868484ノート

反応式

HRID 1868484 の反応式
[C:1]([C:4]1[C:5]([CH3:26])=[N:6][C:7]2[N:8]([CH:18]=[C:19]([CH2:21][C:22]([O:24][CH3:25])=[O:23])[N:20]=2)[C:9]=1[C:10]1[CH:15]=[CH:14][C:13]([Cl:16])=[CH:12][C:11]=1[Cl:17])(=O)[NH2:2].CCN(CC)CC.FC(F)(F)C(OC(=O)C(F)(F)F)=O.[NH4+].[Cl-]>C(Cl)Cl>[C:1]([C:4]1[C:5]([CH3:26])=[N:6][C:7]2[N:8]([CH:18]=[C:19]([CH2:21][C:22]([O:24][CH3:25])=[O:23])[N:20]=2)[C:9]=1[C:10]1[CH:15]=[CH:14][C:13]([Cl:16])=[CH:12][C:11]=1[Cl:17])#[N:2]

参加物

6

反応物 4

HCID 8471TriethylamineHCID 9845Trifluoroacetic anhydrideHCID 25517Ammonium ChlorideHCID 57982488Methyl 2-(6-carbamoyl-5-(2,4-dichlorophenyl)-7-methylimidazo[1,2-a]pyrimidin-2-yl)acetate

生成物 1

HCID 57982479Methyl 2-(6-cyano-5-(2,4-dichlorophenyl)-7-methylimidazo[1,2-a]pyrimidin-2-yl)acetate収率 80%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

To a suspension of methyl 2-(6-carbamoyl-5-(2,4-dichlorophenyl)-7-methylimidazo[1,2-a]pyrimidin-2-yl)acetate (766 mg, 1.95 mmol) in CH2Cl2 (20 mL) was added Et3N (592 mg, 5.85 mmol) and trifluoroacetic anhydride (819 mg, 3.90 mmol). The reaction mixture became a dark brown-green solution within 2 min. Satd aq NH4Cl (20 mL) was added after 30 min. The organic layer was washed with 20 mL each of satd aq NaHCO3 and water, followed by drying with MgSO4, filtration, and concentration under reduced pressure. The residue was purified by silica gel chromatography eluting product through a 40 mm i.d. by 150 mm column with 1.5% MeOH in CH2Cl2. Concentration of the fractions containing product gave methyl 2-(6-cyano-5-(2,4-dichlorophenyl)-7-methylimidazo[1,2-a]pyrimidin-2-yl)acetate (583 mg, 80%) as a yellow foam.

後処理

  1. customwithin 2 min
  2. washThe organic layer was washed with 20 mL each of satd aq NaHCO3 and water
  3. dry with materialby drying with MgSO4, filtration, and concentration under reduced pressure
  4. customThe residue was purified by silica gel chromatography
  5. washeluting product through a 40 mm i.d
  6. additionConcentration of the fractions containing product

出典と根拠

ORDレコード
ord-5bdc80f7e0aa423cbf7b510b55469bd0
出典データセット
uspto-grants-2009_12
特許番号
US07635699B2

反応ノート

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