Urea → 5-(2-chloro-3-methoxyphenyl)pyrimidine-2,4(1H,3H)-dione

HRID 347786ノート

反応式

HRID 347786 の反応式
[Cl:1][C:2]1[C:7]([O:8][CH3:9])=[CH:6][CH:5]=[CH:4][C:3]=1[C:10](=[CH:16]N(C)C)[C:11](OCC)=[O:12].[NH2:20][C:21]([NH2:23])=[O:22].[Na+].[I-].C[Si](Cl)(C)C.[OH-].[Na+]>C(#N)C>[Cl:1][C:2]1[C:7]([O:8][CH3:9])=[CH:6][CH:5]=[CH:4][C:3]=1[C:10]1[C:11](=[O:12])[NH:20][C:21](=[O:22])[NH:23][CH:16]=1

参加物

7

反応物 5

HCID 1176UreaHCID 5238Sodium IodideHCID 6397ChlorotrimethylsilaneHCID 14798Sodium HydroxideHCID 76539495Ethyl 2-(2-chloro-3-methoxyphenyl)-3-(dimethylamino)acrylate

生成物 1

HCID 220378355-(2-chloro-3-methoxyphenyl)pyrimidine-2,4(1H,3H)-dione収率 82%

試薬・触媒・溶媒 1

HCID 6342Acetonitrile溶媒

実験手順

To a mixture of ethyl 2-(2-chloro-3-methoxyphenyl)-3-(dimethylamino)acrylate 7d (1.7 g, 6 mmol), urea (1.08 g, 18 mmol) and NaI (2.7 g, 18 mmol) in acetonitrile (20 mL) was added TMSCl (2.3 mL, 18 mmol). The resulting mixture was refluxed for 16 hours, cooled to room temperature, and 1.0 M NaOH (30 mL) was added. The resultant solution was stirred for 20 hours, and acetonitrile was removed in vacuo. The aqueous solution was washed with ether, cooled in ice bath, and neutralized with 1 N HCl (30 mL). The precipitate was filtered, washed with additional H2O , and dried to give 5-(2-chloro-3-methoxyphenyl)pyrimidine-2,4(1H,3H)-dione 7e (1.24 g, 82% ) as a pale yellow solid. MS (CI) m/z 253.1, 255.1 (MH+).

後処理

  1. temperatureThe resulting mixture was refluxed for 16 hours
  2. customacetonitrile was removed in vacuo
  3. washThe aqueous solution was washed with ether
  4. temperaturecooled in ice bath
  5. filtrationThe precipitate was filtered
  6. washwashed with additional H2O
  7. customdried

出典と根拠

ORDレコード
ord-58c80629b16b4904b39c007555ff1358
出典データセット
uspto-grants-2007_02
特許番号
US07176211B2

反応ノート

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