Sodium ethoxide → (R)-tert-Butyl 1-(3-(3-chloro-4-cyano-2-methylphenyl)-1H-pyrazol-1-yl)propan-2-ylcarbamate

HRID 872566Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 872566
[Cl:1][C:2]1[C:9]([CH3:10])=[C:8]([C:11]2[CH:15]=[CH:14][NH:13][N:12]=2)[CH:7]=[CH:6][C:3]=1[C:4]#[N:5].[O-]CC.[Na+].CS(O[CH2:25][C@H:26]([NH:28][C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH3:27])(=O)=O>C(#N)C>[Cl:1][C:2]1[C:9]([CH3:10])=[C:8]([C:11]2[CH:15]=[CH:14][N:13]([CH2:27][C@H:26]([NH:28][C:29](=[O:30])[O:31][C:32]([CH3:33])([CH3:35])[CH3:34])[CH3:25])[N:12]=2)[CH:7]=[CH:6][C:3]=1[C:4]#[N:5]

Komponenten

5

Edukt 3

HCID 2723922Sodium ethoxideHCID 14427185(R)-2-((tert-butoxycarbonyl)amino)propyl methanesulfonateHCID 178422100HCID 178422100, Verbindung

Produkt 1

HCID 67171349(R)-tert-Butyl 1-(3-(3-chloro-4-cyano-2-methylphenyl)-1H-pyrazol-1-yl)propan-2-ylcarbamateAusbeute 50,8 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342AcetonitrileLösungsmittel2×

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

2-chloro-3-methyl-4-(1H-pyrazol-3-yl)benzonitrile (0.5 g, 2.297 mmol) was dissolved in dry acetonitrile (5 ml) under nitrogen and cooled to 0° C. Sodium ethoxide (0.313 g, 4.59 mmol) was added and the reaction mixture was stirred for 25 min and allowed to warm up to RT. (R)-2-(tert-butoxycarbonylamino)propyl methanesulfonate (0.582 g, 2.297 mmol) was dissolved in 5 ml of dry acetonitrile and added dropwise to the reaction mixture. The reaction mixture was refluxed for 15 h and then the solvents were evaporated. The residue was taken into EtOAc, washed several times with saturated aqueous NaHCO3 and water, dried with Na2SO4 and evaporated to dryness. CombiFlash purification afforded 0.437 g of the title compound using heptane/EtOAc-system as an eluent. 1H-NMR (400 MHz; d6-DMSO): δ 1.02 (d, 3H), 1.31 (s, 9H), 2.57 (s, 3H), 3.91 (m, 1H), 4.13 (m, 2H), 6.62 (m, 1H), 6.87 (d, 1H), 7.66 (d, 1H), 7.78 (d, 1H), 7.83 (d, 1H).

Aufarbeitung

  1. temperatureto warm up to RT
  2. additionadded dropwise to the reaction mixture
  3. temperatureThe reaction mixture was refluxed for 15 h
  4. customthe solvents were evaporated
  5. washwashed several times with saturated aqueous NaHCO3 and water
  6. dry with materialdried with Na2SO4
  7. customevaporated to dryness
  8. customCombiFlash purification

Quellen und Nachweise

ORD-Eintrag
ord-cd301dde5c9344b0830433a698f60963
Quelldatensatz
uspto-grants-2015_03
Patentnummer
US08975254B2

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