3-Chloro-4-fluoroaniline → Ethyl 4-[(3-chloro-4-fluorophenyl)amino]-5,8-dihydropyrido[4',3':4,5]furo[2,3-d]pyrimidine-7(6H)-carboxylate

HRID 38534

反応式

HRID 38534 の反応式
[C:1]([C:3]1[C:11]2[CH2:10][CH2:9][N:8]([C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH2:7][C:6]=2[O:5][C:4]=1/[N:17]=[CH:18]/[N:19](C)C)#[N:2].[Cl:22][C:23]1[CH:24]=[C:25]([CH:27]=[CH:28][C:29]=1[F:30])N>C(#N)C.C(O)(=O)C>[Cl:22][C:23]1[CH:24]=[C:25]([NH:2][C:1]2[C:3]3[C:11]4[CH2:10][CH2:9][N:8]([C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH2:7][C:6]=4[O:5][C:4]=3[N:17]=[CH:18][N:19]=2)[CH:27]=[CH:28][C:29]=1[F:30]

参加物

5

反応物 2

HCID 97083-Chloro-4-fluoroanilineHCID 58116902ethyl 3-cyano-2-[(E)-dimethylaminomethylideneamino]-5,7-dihydro-4H-furo[2,3-c]pyridine-6-carboxylate

生成物 1

HCID 58116794Ethyl 4-[(3-chloro-4-fluorophenyl)amino]-5,8-dihydropyrido[4',3':4,5]furo[2,3-d]pyrimidine-7(6H)-carboxylate収率 22.3%

試薬・触媒・溶媒 2

HCID 176Acetic Acid溶媒HCID 6342Acetonitrile溶媒

実験手順

Ethyl 3-cyano-2-{[(1E)-(dimethylamino)methylidene]amino}-4,7-dihydrofuro[2,3-c]pyridine-6(5H)-carboxylate from Example 37A (1.20 g, 4.14 mmol) and 3-chloro-4-fluoroaniline (1.20 g, 8.27 mmol) were heated in a mixture of acetonitrile (20 mL) and acetic acid (10 mL) in a microwave oven for 30 min to 160° C. The mixture was then concentrated in vacuo, diluted with water, basified with aqueous sodium hydroxide solution and extracted with ethyl acetate. The organic layer was dried over sodium sulfate, and the solvent was evaporated. The residue was triturated with dichloromethane and left to stand for 20 h. The precipitate was collected by suction filtration. Subsequently, the solid was triturated with methanol. The crystals were collected by suction filtration and washed with diethyl ether to yield 360 mg (22%) of the title compound. A second batch of 159 mg (10%) was obtained from the mother liquor after purification by preparative HPLC.

後処理

  1. concentrationThe mixture was then concentrated in vacuo
  2. additiondiluted with water
  3. extractionextracted with ethyl acetate
  4. dry with materialThe organic layer was dried over sodium sulfate
  5. customthe solvent was evaporated
  6. customThe residue was triturated with dichloromethane
  7. waitleft
  8. filtrationThe precipitate was collected by suction filtration
  9. customSubsequently, the solid was triturated with methanol
  10. filtrationThe crystals were collected by suction filtration
  11. washwashed with diethyl ether

出典と根拠

ORDレコード
ord-e3fb2485ce874a8fa86fc9d0b8d0056b
出典データセット
uspto-grants-2013_09
特許番号
US08524722B2

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