Water → Ethyl 2-(2-phenyloxazol-4-yl)nicotinate

HRID 1400239ノート

反応式

HRID 1400239 の反応式
[CH2:1]([O:3][C:4](=[O:12])[C:5]1[CH:10]=[CH:9][CH:8]=[N:7][C:6]=1Cl)[CH3:2].[C:13]1([C:19]2[O:20][CH:21]=[C:22](B3OC(C)(C)C(C)(C)O3)[N:23]=2)[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.C([O-])([O-])=O.[K+].[K+].O>O1CCOCC1.C(C1C=CC=C(C(C)C)C=1N1C=CN(C2C(C(C)C)=CC=CC=2C(C)C)C1=[Pd-3](Cl)(Cl)C1C(Cl)=CC=CN=1)(C)C>[C:13]1([C:19]2[O:20][CH:21]=[C:22]([C:6]3[N:7]=[CH:8][CH:9]=[CH:10][C:5]=3[C:4]([O:3][CH2:1][CH3:2])=[O:12])[N:23]=2)[CH:14]=[CH:15][CH:16]=[CH:17][CH:18]=1

参加物

7

反応物 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 2796614Ethyl chloronicotinateHCID 115581042-Phenyl-1,3-oxazole-4-boronic acid, pinacol ester

生成物 1

HCID 67540589Ethyl 2-(2-phenyloxazol-4-yl)nicotinate収率 42%

試薬・触媒・溶媒 2

HCID 178439029HCID 178439029、化合物触媒HCID 312751,4-Dioxane溶媒

反応条件

温度
65 °C

実験手順

[1,3-Bis(2,6-Diisopropylphenyl)imidazol-2-ylidene](3-chloropyridyl)palladium(II) dichloride (22 mg, 0.032 mmol) was added to a mixture of ethyl-2-chloronicotinate (120 mg, 0.647 mmol) and 2-phenyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)oxazole (220 mg, 0.811 mmol) in dioxane (5 mL). After the addition of K2CO3 (402 mg, 2.910 mmol) the reaction mixture was heated at 65° C. for 4 h and then allowed to cool to room temperature. Water was added and the mixture was extracted with EtOAc. The combined organic layers were washed with water and dried (MgSO4). Purification of the thus obtained raw product by flash column chromatography (dichloromethane/EtOAc, gradient 5-10% EtOAc) provided the title compound (80 mg, 42%); ESI-MS [M+H+]=295.1.

後処理

  1. temperatureto cool to room temperature
  2. extractionthe mixture was extracted with EtOAc
  3. washThe combined organic layers were washed with water
  4. dry with materialdried (MgSO4)
  5. customPurification of the
  6. customthus obtained raw product by flash column chromatography (dichloromethane/EtOAc, gradient 5-10% EtOAc)

出典と根拠

ORDレコード
ord-2f4f9d04cb6d4f4db6cd9ea6bbb516ca
出典データセット
uspto-grants-2014_12
特許番号
US08906941B2

反応ノート

読み込み中…