1,2-Dichloroethane → 2-[4-(4-methyl-1,3-oxazol-5-yl)phenyl]-N-[(1R)-1-[5-(2,2,2-trifluoroethoxy)pyridin-2-yl]ethyl]acetamide

HRID 254736ノート

反応式

HRID 254736 の反応式
[CH3:1][C:2]1[N:3]=[CH:4][O:5][C:6]=1[C:7]1[CH:12]=[CH:11][C:10]([CH2:13][C:14]([OH:16])=O)=[CH:9][CH:8]=1.[Cl-].[Cl-].[NH3+:19][C@@H:20]([C:22]1[CH:27]=[CH:26][C:25]([O:28][CH2:29][C:30]([F:33])([F:32])[F:31])=[CH:24][NH+:23]=1)[CH3:21].C1C=NC2N(O)N=NC=2C=1.C(Cl)CCl.CCN(C(C)C)C(C)C>C(Cl)Cl>[CH3:1][C:2]1[N:3]=[CH:4][O:5][C:6]=1[C:7]1[CH:8]=[CH:9][C:10]([CH2:13][C:14]([NH:19][C@@H:20]([C:22]2[CH:27]=[CH:26][C:25]([O:28][CH2:29][C:30]([F:33])([F:31])[F:32])=[CH:24][N:23]=2)[CH3:21])=[O:16])=[CH:11][CH:12]=1

参加物

7

反応物 5

HCID 111,2-DichloroethaneHCID 81531DiisopropylethylamineHCID 181649HOAtHCID 66893778[4-(4-Methyl-1,3-oxazol-5-yl)phenyl]acetic acidHCID 178462209HCID 178462209、化合物

生成物 1

HCID 579484902-[4-(4-methyl-1,3-oxazol-5-yl)phenyl]-N-[(1R)-1-[5-(2,2,2-trifluoroethoxy)pyridin-2-yl]ethyl]acetamide収率 51.4%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒2 回

実験手順

To a solution of 3.00 g (14.0 mmol) 4-bromophenyl acetic acid in 25.0 ml DMF was added 3.60 g (27.9 mmol) 4-methyl-1,3-oxazole-5-carboxylic acid, 6.80 g (20.9 mmol) cesium carbonate, 4.1 g (14.0 mmol) tetrabutyl ammonium chloride monohydrate, and 0.400 g (0.700 mmol) bis(tri-t-butylphosphine)palladium(0). After 3.00 h at 140° C., the reaction mixture was, diluted with CH2Cl2, washed with 10% citric acid, washed twice with water, and washed with brine. The organic layer was dried over NaSO4, filtered and concentrated in vacuo. Purification by preparative HPLC (5→95% CH3CN/H2O over 20 min, 0.05% added TFA, C18 50×150 mm) afforded 0.730 g (24%) [4-(4-methyl-1,3-oxazol-5-yl)phenyl]acetic acid. 1H NMR (CD3OD, 400 MHz) δ 8.14 (s, 1H); 7.61 (d, 2H, J=8.32 Hz); 7.41 (d, 2H, J=8.33 Hz); 3.65 (s, 2H); 2.41 (s, 3H). ESMS+1 for C12H11NO3: 218.1. To a solution of 0.725 g (3.34 mmol) [4-(4-methyl-1,3-oxazol-5-yl)phenyl]acetic acid in 7.00 ml CH2Cl2 was added 0.978 g (3.34 mmol) 2-[(1R)-1-ammonioethyl]-5-(2,2,2-trifluoroethoxy)pyridinium dichloride, 0.591 g (4.34 mmol) HOAT, 0.832 g (4.34 mmol) EDC, and 1.75 mL (10.0 mmol) DIEA. After 24.0 h at room temperature, the reaction mixture was diluted with CH2Cl2, washed three times with water, and washed with brine. The organic layer was dried over NaSO4, filtered and concentrated in vacuo. Purification by flash chromatography (1×14 cm silica gel, linear gradient 20-100% EtOAc:hexane) afforded 0.720 g (51.4%) 2-[4-(4-methyl-1,3-oxazol-5-yl)phenyl]-N-{(1R)-1-[5-(2,2,2-trifluoroethoxy)pyridin-2-yl]ethyl}acetamide. 1H NMR (CDCl3, 400 MHz) δ 8.22 (d, 1H, J=2.38 Hz); 7.83 (s, 1H); 7.59 (dd, 2H, J=1.83 Hz, 6.59 Hz); 7.36 (d, 2H, J=8.42 Hz); 7.22 (m, 2H); 6.72 (br d, 1H, J=7.51 Hz); 5.12 (m, 1H); 4.38 (q, 2H, J=8.06 Hz); 3.62 (s, 2H); 2.45 (s, 3H); 1.41 (d, 3H, J=6.78). HRMS (ES) exact mass calcd for C21H20F3N3O3: 420.1540, Found: 420.1530.

後処理

  1. washwashed three times with water
  2. washwashed with brine
  3. dry with materialThe organic layer was dried over NaSO4
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customPurification by flash chromatography (1×14 cm silica gel, linear gradient 20-100% EtOAc:hexane)

出典と根拠

ORDレコード
ord-5a2e22e11eb341c4bf10cf9e05c93823
出典データセット
uspto-grants-2011_01
特許番号
US07875636B2

反応ノート

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