1,2-Dichloroethane → 5-(3-(2-(Hydroxymethyl)pyridin-4-yl)-1,2,4-oxadiazol-5-yl)-2-isopropoxybenzonitrile

HRID 1807626Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1807626
C(C1C=C(C=CC=1OC(C)C)C(O)=O)#N.C1C=CC2N(O)N=NC=2C=1.C(Cl)CCl.[Si](OCC1C=C(C=CN=1)C(=N)NO)(C(C)(C)C)(C)C.[Si]([O:56][CH2:57][C:58]1[CH:59]=[C:60]([CH:79]=[CH:80][N:81]=1)[C:61](=[NH:78])[NH:62][O:63][C:64](=O)[C:65]1[CH:70]=[CH:69][C:68]([O:71][CH:72]([CH3:74])[CH3:73])=[C:67]([C:75]#[N:76])[CH:66]=1)(C(C)(C)C)(C)C>CN(C=O)C.CO>[OH:56][CH2:57][C:58]1[CH:59]=[C:60]([C:61]2[N:78]=[C:64]([C:65]3[CH:70]=[CH:69][C:68]([O:71][CH:72]([CH3:74])[CH3:73])=[C:67]([CH:66]=3)[C:75]#[N:76])[O:63][N:62]=2)[CH:79]=[CH:80][N:81]=1

Komponenten

8

Edukt 5

HCID 111,2-DichloroethaneHCID 757711-HydroxybenzotriazoleHCID 21956832RP-101124HCID 178455121HCID 178455121, VerbindungHCID 178458475HCID 178458475, Verbindung

Produkt 1

HCID 583550135-(3-(2-(Hydroxymethyl)pyridin-4-yl)-1,2,4-oxadiazol-5-yl)-2-isopropoxybenzonitrileAusbeute 8 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittelHCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
85 °C

Versuchsvorschrift

Prepared using General Procedure 2. To a solution of 3-cyano-4-isopropoxybenzoic acid (0.033 g, 0.16 mmol) in DMF (1.0 mL) was added HOBt (0.036 g, 0.23 mmol) and EDC (0.045 g, 0.23 mmol) at room temperature. The reaction was stirred for 0.5 h until the complete formation of the HOBt-acid complex. 2-((Tert-butyldimethylsilyloxy)methyl)-N-hydroxyisonicotinimidamide INT-72 (0.050 g, 0.18 mmol) was added and the mixture was stirred at room temperature for 0.5 h until the formation of the intermediate 2-((tert-butyldimethylsilyloxy)methyl)-N-(3-cyano-4-isopropoxy benzoyloxy)isonicotinimidamide was observed. The reaction mixture was then heated at 85° C. for 4 h. To the cooled reaction mixture MeOH (1.0 mL) was added, and the solution was filtered. The resulting filtrate was purified by preparative HPLC to produce 5.6 mg (8%) of 5-(3-(2-(hydroxymethyl)pyridin-4-yl)-1,2,4-oxadiazol-5-yl)-2-isopropoxybenzonitrile 71 as the TFA salt. LCMS-ESI (m/z) calculated for C18H16N4O3: 336.3; found 337.1 [M+H]+, tR=7.45 min (Method 2). NMR (400 CD3OD) δ 8.78 (d, J=5.5, 1H), 8.48 (dd, J=10.6, 8.3, 1.4, 3H), 8.23 (dd, J=5.5, 1.6, 1H), 7.48 (d, J=9.0, 1H), 4.93 (s, 2H), 4.89 (m, 1H), 1.48 (d, J=6.1, 6H).

Aufarbeitung

  1. customPrepared
  2. additionwas added
  3. filtrationthe solution was filtered
  4. customThe resulting filtrate was purified by preparative HPLC

Quellen und Nachweise

ORD-Eintrag
ord-b20174a042674223810d8476792bd7c5
Quelldatensatz
uspto-grants-2013_01
Patentnummer
US08357706B2

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