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Triphenylphosphine → Methyl 3-[5-(dimethylcarbamoyl)pyrazin-2-yl]oxy-5-[(2S)-1-[(2-methylpropan-2-yl) oxy]propan-2-yl]oxy-benzoate

HRID 2241941
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 2241941
[CH3:1][N:2]([CH3:23])[C:3]([C:5]1[N:6]=[CH:7][C:8]([O:11][C:12]2[CH:13]=[C:14]([CH:19]=[C:20]([OH:22])[CH:21]=2)[C:15]([O:17][CH3:18])=[O:16])=[N:9][CH:10]=1)=[O:4].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[CH3:43][C:44]([O:47][CH2:48][C@H:49](O)[CH3:50])([CH3:46])[CH3:45].CCOC(/N=N/C(OCC)=O)=O>C1COCC1>[CH3:23][N:2]([CH3:1])[C:3]([C:5]1[N:6]=[CH:7][C:8]([O:11][C:12]2[CH:13]=[C:14]([CH:19]=[C:20]([O:22][C@@H:49]([CH3:50])[CH2:48][O:47][C:44]([CH3:46])([CH3:45])[CH3:43])[CH:21]=2)[C:15]([O:17][CH3:18])=[O:16])=[N:9][CH:10]=1)=[O:4]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 4

HCID 11776TriphenylphosphineHCID 5462977Diethyl azodicarboxylateHCID 11557288(R)-1-tert-Butoxy-2-propanolHCID 59205093Methyl 3-[5-(dimethylcarbamoyl)pyrazin-2-yl]oxy-5-hydroxy-benzoate

Produkt 1

HCID 59205102Methyl 3-[5-(dimethylcarbamoyl)pyrazin-2-yl]oxy-5-[(2S)-1-[(2-methylpropan-2-yl) oxy]propan-2-yl]oxy-benzoate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

To methyl 3-[5-(dimethylcarbamoyl)pyrazin-2-yl]oxy-5-hydroxy-benzoate (10 g, 32 mmol) was added triphenylphosphine (10.3 g, 39.4 mmol), THF (100 mL) and (2R)-1-[(2-methylpropan-2-yl)oxy]propan-2-ol (CAS no. 136656-73-0) (5.21 g, 39.4 mmol). The resulting slurry was cooled to 0° C. and diethylazodicarboxylate (50% w/v in toluene, 13.7 mL, 39.4 mmol) was charged dropwise keeping the temperature below 10° C. After 2 hours the solvent was evaporated under reduced pressure and taken up with ethyl acetate (23 mL). A solid crashed out which was filtered and the mother liquors were evaporated under reduced pressure, taken up into ethyl acetate (23 mL) and isohexane (53 mL) and the resulting solid filtered, the mother liquors were evaporated under reduced pressure and the resulting residue was purified by flash chromatography eluting with 80% ethyl acetate/20% isohexane to afford the product (13.5 g).

Aufarbeitung

  1. customthe temperature below 10° C
  2. customAfter 2 hours the solvent was evaporated under reduced pressure
  3. filtrationwas filtered
  4. customthe mother liquors were evaporated under reduced pressure
  5. filtrationthe resulting solid filtered
  6. customthe mother liquors were evaporated under reduced pressure
  7. customthe resulting residue was purified by flash chromatography
  8. washeluting with 80% ethyl acetate/20% isohexane

Quellen und Nachweise

ORD-Eintrag
ord-da7ebb13b3904d14b485bac5c147f2cd
Quelldatensatz
uspto-grants-2010_03
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07671060B2

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