Cesium carbonate → (7-((3,4-Difluorobenzyl)oxy)-1,5-naphthyridin-3-yl)methanol

HRID 1748411ノート

反応式

HRID 1748411 の反応式
[F:1][C:2]1[CH:3]=[C:4]([CH:22]=[CH:23][C:24]=1[F:25])[CH2:5][O:6][C:7]1[CH:16]=[C:15]2[C:10]([CH:11]=[C:12]([C:17](OCC)=[O:18])[CH:13]=[N:14]2)=[N:9][CH:8]=1.OC1C=C2C(C=C(C(OCC)=O)C=N2)=NC=1.C([O-])([O-])=O.[Cs+].[Cs+].FC1C=C(C=CC=1F)CBr>CN(C=O)C.O.CCOC(C)=O>[F:1][C:2]1[CH:3]=[C:4]([CH:22]=[CH:23][C:24]=1[F:25])[CH2:5][O:6][C:7]1[CH:16]=[C:15]2[C:10]([CH:11]=[C:12]([CH2:17][OH:18])[CH:13]=[N:14]2)=[N:9][CH:8]=1

参加物

8

反応物 4

HCID 10796Cesium carbonateHCID 5814364-(Bromomethyl)-1,2-difluorobenzeneHCID 90417578Ethyl 7-((3,4-difluorobenzyl)oxy)-1,5-naphthyridine-3-carboxylateHCID 136227102Ethyl 7-hydroxy-1,5-naphthyridine-3-carboxylate2 回

生成物 1

HCID 86301659(7-((3,4-Difluorobenzyl)oxy)-1,5-naphthyridin-3-yl)methanol収率 64%

試薬・触媒・溶媒 3

HCID 962Water溶媒HCID 6228Dimethylformamide溶媒HCID 8857Ethyl Acetate溶媒

実験手順

Ethyl 7-((3,4-difluorobenzyl)oxy)-1,5-naphthyridine-3-carboxylate. To a solution of ethyl 7-hydroxy-1,5-naphthyridine-3-carboxylate (Intermediate 4, 1.0 g, 4.5 mmol) in DMF (20 mL) was added Cs2CO3 (2.2 g, 6.75 mmol), followed by 3,4-difluorobenzyl bromide (0.682 mL, 5.02 mmol). The reaction was stirred at ambient temperature for 72 h. The crude reaction mixture was poured into EtOAc and water. The aqueous layer was extracted with EtOAc and the combined organic fractions were washed with brine and concentrated under reduced pressure onto silica. Purification (FCC, SiO2, 0-60%, EtOAc/hexanes) afforded the title compound as a white solid (1.05 g, 64%) 1H NMR (400 MHz, CDCl3) δ 9.48-9.41 (m, 1H), 8.97 (s, 1H), 8.89-8.82 (m, 1H), 7.69 (s, 1H), 7.37-7.29 (m, 1H), 7.25-7.19 (m, 2H), 5.20 (s, 2H), 4.54-4.40 (m, 2H), 1.51-1.41 (m, 3H). [M+H]=345.2.

後処理

  1. customThe crude reaction mixture
  2. extractionThe aqueous layer was extracted with EtOAc
  3. washthe combined organic fractions were washed with brine
  4. concentrationconcentrated under reduced pressure onto silica
  5. customPurification (FCC, SiO2, 0-60%, EtOAc/hexanes)

出典と根拠

ORDレコード
ord-5fb1c5c2626c42a6959f71623019e531
出典データセット
uspto-grants-2015_10
特許番号
US09150572B2

反応ノート

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