Dichloromethane → Methyl 2-(4-trifluoromethyl-2-pyridyloxy)propionate

HRID 1987290ノート

反応式

HRID 1987290 の反応式
[F:1][C:2]([F:16])([F:15])[C:3]1[CH:8]=[CH:7][N:6]=[C:5]([O:9][CH:10]([CH3:14])[C:11]([OH:13])=[O:12])[CH:4]=1.[CH2:17](Cl)Cl>CO.CCCCCC>[F:16][C:2]([F:15])([F:1])[C:3]1[CH:8]=[CH:7][N:6]=[C:5]([O:9][CH:10]([CH3:14])[C:11]([O:13][CH3:17])=[O:12])[CH:4]=1

参加物

5

反応物 2

HCID 6344DichloromethaneHCID 22270370HCID 22270370、化合物

生成物 1

HCID 22270664Methyl 2-(4-trifluoromethyl-2-pyridyloxy)propionate

試薬・触媒・溶媒 2

HCID 887Methanol溶媒HCID 8058Hexane溶媒

実験手順

To a solution of 2-(4-trifluoromethyl-2-pyridyloxy)propionic acid (Step A, 15 g, 55 mol) in 100 mL CH2Cl2 and 100 mL MeOH at 0° C. was added trimethylsilydiazomethane (2 M solution in hexane) until a yellow color persisted. After stirring at room temperature for 15 min, the reaction mixture was concentrated to dryness, and the residue was purified by flash chromatography on silica gel eluted with 0 to 10% EtOAc in hexane to give methyl 2-(4-trifluoromethyl-2-pyridyloxy)propionate (10 g), which was used immediately for methylation following the procedure described in Reference Example 39, Step B substituting ethyl iodide with methyl iodide. 1H NMR (500 MHz, CD3OD): δ 8.25 (d, 1H), 7.18 (d, 1H), 7.15 (s, 1H), 3.65 (s, 3H), 1.65 (s, 6H).

後処理

  1. concentrationthe reaction mixture was concentrated to dryness
  2. customthe residue was purified by flash chromatography on silica gel
  3. washeluted with 0 to 10% EtOAc in hexane

出典と根拠

ORDレコード
ord-fba902d574324552814629e4794e1754
出典データセット
uspto-grants-2009_06
特許番号
US07550489B2

反応ノート

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