Cesium carbonate → ethyl (2E)-3-(5-{[(3R)-1-(benzyloxy)-6-oxo-3-piperidinyl]amino}-2-pyrazinyl)acrylate

HRID 2376081ノート

反応式

HRID 2376081 の反応式
Cl[C:2]1[N:3]=[CH:4][C:5](/[CH:8]=[CH:9]/[C:10]([O:12][CH2:13][CH3:14])=[O:11])=[N:6][CH:7]=1.[NH2:15][C@H:16]1[CH2:21][N:20]([O:22][CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)[C:19](=[O:30])[CH2:18][CH2:17]1.C1(P(C2CCCCC2)C2C=CC=CC=2C2C=CC=CC=2N(C)C)CCCCC1.C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCOCC1.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH2:23]([O:22][N:20]1[C:19](=[O:30])[CH2:18][CH2:17][C@@H:16]([NH:15][C:2]2[N:3]=[CH:4][C:5](/[CH:8]=[CH:9]/[C:10]([O:12][CH2:13][CH3:14])=[O:11])=[N:6][CH:7]=2)[CH2:21]1)[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1

参加物

7

反応物 4

HCID 10796Cesium carbonateHCID 27342172-(Dicyclohexylphosphino)-2'-(dimethylamino)biphenylHCID 68960470(5R)-5-amino-1-(benzyloxy)-2-piperidinoneHCID 86603667Ethyl (2E)-3-(5-chloro-2-pyrazinyl)acrylate

生成物 1

HCID 86603704ethyl (2E)-3-(5-{[(3R)-1-(benzyloxy)-6-oxo-3-piperidinyl]amino}-2-pyrazinyl)acrylate収率 43.2%

試薬・触媒・溶媒 2

HCID 167845palladium(II) acetate触媒HCID 312751,4-Dioxane溶媒

反応条件

温度
95 °C

実験手順

Ethyl (2E)-3-(5-chloro-2-Pyrazinyl)acrylate (250 mg, 1.18 mmol) and (5R)-5-amino-1-(benzyloxy)-2-piperidinone (388 mg, 1.86 mmol) were combined in 1,4-dioxane (4 mL) at ambient temperature. To this solution were added palladium(II) acetate (18 mg, 0.8 mmol) and 2-dicyclohexylphosphino-2′-(N,N-dimethylamino)biphenyl (46 mg, 0.1 mmol) at the same temperature and the mixture was stirred for 5 minutes. To the resulting mixture was added cesium carbonate (536 mg, 1.86 mmol) and the mixture was heated at 95° C. for 24 hrs. The reaction mixture was evaporated in vacuo and the residue was partitioned between water and EtOAc. The organic layer was separated, washed water and brine, dried over magnesium sulfate, and evaporated in vacuo. The residue was purified by silica gel column chromatography (CHCl3/methanol=95/1) to give ethyl (2E)-3-(5-{[(3R)-1-(benzyloxy)-6-oxo-3-piperidinyl]amino}-2-pyrazinyl)acrylate (202 mg, 43%) as an amorphous solid.

後処理

  1. customThe reaction mixture was evaporated in vacuo
  2. customthe residue was partitioned between water and EtOAc
  3. customThe organic layer was separated
  4. washwashed water and brine
  5. dry with materialdried over magnesium sulfate
  6. customevaporated in vacuo
  7. customThe residue was purified by silica gel column chromatography (CHCl3/methanol=95/1)

出典と根拠

ORDレコード
ord-b5436d803bb54ec1b3f0f0a7d2de7ed4
出典データセット
uspto-grants-2008_12
特許番号
US07465731B2

反応ノート

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