2-Methoxy-4-nitrophenol → 1-(4-(2-hydroxy-2-methylpropoxy)-3-methoxyphenyl)-3-(2-(pyridin-2-yl)ethylthio)pyrazin-2(1H)-one

HRID 562595ノート

反応式

HRID 562595 の反応式
COC1C=C([N+]([O-])=O)C=CC=1O.[OH:13][C:14]([CH3:34])([CH3:33])[CH2:15][O:16][C:17]1[CH:22]=[CH:21][C:20]([N:23]2[CH:28]=[CH:27][NH:26][C:25](=O)[C:24]2=[O:30])=[CH:19][C:18]=1[O:31][CH3:32].C(N(C(C)C)C(C)C)C.C1CN([P+](ON2N=NC3C=CC=CC2=3)(N2CCCC2)N2CCCC2)CC1.F[P-](F)(F)(F)(F)F.[N:77]1[CH:82]=[CH:81][CH:80]=[CH:79][C:78]=1[CH2:83][CH2:84][SH:85]>CN(C=O)C>[OH:13][C:14]([CH3:34])([CH3:33])[CH2:15][O:16][C:17]1[CH:22]=[CH:21][C:20]([N:23]2[CH:28]=[CH:27][N:26]=[C:25]([S:85][CH2:84][CH2:83][C:78]3[CH:79]=[CH:80][CH:81]=[CH:82][N:77]=3)[C:24]2=[O:30])=[CH:19][C:18]=1[O:31][CH3:32]

参加物

7

反応物 5

HCID 767382-Methoxy-4-nitrophenolHCID 81531DiisopropylethylamineHCID 1509632-PyridineethanethiolHCID 2724699PyBOPHCID 668507271-(4-(2-hydroxy-2-methylpropoxy)-3-methoxyphenyl)pyrazine-2,3(1H,4H)-dione2 回

生成物 1

HCID 251692021-(4-(2-hydroxy-2-methylpropoxy)-3-methoxyphenyl)-3-(2-(pyridin-2-yl)ethylthio)pyrazin-2(1H)-one収率 68%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

実験手順

Following the procedures described in parts A-D of example 134, 2-methoxy-4-nitrophenol was converted to 1-(4-(2-hydroxy-2-methylpropoxy)-3-methoxyphenyl)pyrazine-2,3(1H,4H)-dione. A solution of 1-(4-(2-hydroxy-2-methylpropoxy)-3-methoxyphenyl)pyrazine-2,3(1H,4H)-dione prepared in Part ? (2.28 g, 7.44 mmol), EtN(iPr)2 (3.9 mL, 22.3 mmol), PyBOP (6.78 g, 13.0 mmol) in DMF (35 mL) was stirred at ambient temperature for 1.5 h. After addition of 2-pyridylethyl mercaptan (1.24 g, 8.93 mmol), the reaction was stirred at ambient temperature. After stirring overnight the reaction mixture was partially concentrated under reduced pressure, quenching by addition of aq. NaHCO3 and extracted with EtOAc. The EtOAc extracts were washed with brine, dried over MgSO4 and concentrated. Chromatography on silica employing a gradient elution with 2.5-10% methanol/methylene chloride, followed by chromatography on silica eluting with EtOAc, and trituration with EtOAc/Hexanes afforded the desired product 1-(4-(2-hydroxy-2-methylpropoxy)-3-methoxyphenyl)-3-(2-(pyridin-2-yl)ethylthio)pyrazin-2(1H)-one (2.15 g, 68% yield).

後処理

  1. stirringAfter stirring overnight the reaction mixture
  2. concentrationwas partially concentrated under reduced pressure
  3. customquenching by addition of aq. NaHCO3
  4. extractionextracted with EtOAc
  5. washThe EtOAc extracts were washed with brine
  6. dry with materialdried over MgSO4
  7. concentrationconcentrated
  8. washChromatography on silica employing a gradient elution with 2.5-10% methanol/methylene chloride

出典と根拠

ORDレコード
ord-f981bbb9c5fe4a55bb429cbb30320eb6
出典データセット
uspto-grants-2011_11
特許番号
US08067420B2

反応ノート

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