Hydrochloric Acid → [3-(2,2-Difluoro-2-pyridin-2-yl-ethylamino)-2-oxo-2h-pyrazin-1-yl]acetic acid

HRID 1795292ノート

反応式

HRID 1795292 の反応式
C([O:3][C:4](=[O:24])[CH2:5][N:6]1[CH:11]=[CH:10][N:9]=[C:8]([NH:12][CH2:13][C:14]([F:22])([F:21])[C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][N:16]=2)[C:7]1=[O:23])C.[OH-].[Li+].Cl>CO.CCOCC>[F:22][C:14]([F:21])([C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][N:16]=1)[CH2:13][NH:12][C:8]1[C:7](=[O:23])[N:6]([CH2:5][C:4]([OH:24])=[O:3])[CH:11]=[CH:10][N:9]=1

参加物

6

反応物 3

HCID 313Hydrochloric AcidHCID 3939Lithium HydroxideHCID 10290909[3-(2,2-difluoro-2-pyridin-2-yl-ethylamino)-2-oxo-2H-pyrazin-1-yl]-acetic acid ethyl ester

生成物 1

HCID 22185125[3-(2,2-Difluoro-2-pyridin-2-yl-ethylamino)-2-oxo-2h-pyrazin-1-yl]acetic acid

試薬・触媒・溶媒 2

HCID 887Methanol溶媒HCID 3283Diethyl Ether溶媒

実験手順

To a solution of 2.84 g (8.41 mmol) [3-(2,2-difluoro-2-pyridin-2-yl-ethylamino)-2oxo-2H-pyrazin-1-yl]-acetic acid ethyl ester (preparation described in example 17, step K) in 10.0 mL methanol was added 8.83 mL (8.83 mmol) 1.0N lithium hydroxide (aq) and the light yellow solution stirred 1 h at room temperature. The reaction pH was adjusted to 7.0 with a dropwise addition of 1.0N HCl in ether to give a precipitate. The solid was removed by filtration, washed well with water and dried under high vacuum for 24 h to give 3-[2,2-Difluoro-2-pyridin-2-yl-ethylamino)-2-oxo-2H-pyrazin-1-yl]acetic acid as a white solid: 1H NMR (DMSO-d6, 400 MHz): δ 13.13 (br s, 1H), 8.70 (d, 1H, J=4.7 Hz), 7.98 (t, 1H, J=7.8 Hz), 7.70 (d, 1H, J=7.9 Hz), 7.60–7.55 (m, 1H), 7.16 (t, 1H, J=6.7 Hz), 6.84 (d, 1H, J=4.7 Hz), 6.73 (d, 1H, J=4.6 Hz), 4.57 (s, 2H), 4.24 (dt, 2H, J=6.6 and 15.2 Hz); MS (Electrospray): M+H=311.0.

後処理

  1. customto give a precipitate
  2. customThe solid was removed by filtration
  3. washwashed well with water
  4. customdried under high vacuum for 24 h
  5. customto give 3-[2,2-Difluoro-2-pyridin-2-yl-ethylamino)-2-oxo-2H-pyrazin-1-yl]acetic acid as a white solid

出典と根拠

ORDレコード
ord-5ea920d2ff67417cb8110eabba67261b
出典データセット
uspto-grants-2006_04
特許番号
US07026324B2

反応ノート

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