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Nitric Acid → Ethyl 5-methoxy-4-((1-methylpiperidin-4-yl)methoxy)-2-nitrobenzoate

HRID 346550
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 346550
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:11]=[CH:12][C:13]=1[O:14][CH2:15][CH:16]1[CH2:21][CH2:20][N:19]([CH3:22])[CH2:18][CH2:17]1)[C:6]([O:8][CH2:9][CH3:10])=[O:7].C(O)(C(F)(F)F)=O.[N+:30]([O-])([OH:32])=[O:31]>C(Cl)Cl>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:11]([N+:30]([O-:32])=[O:31])=[CH:12][C:13]=1[O:14][CH2:15][CH:16]1[CH2:17][CH2:18][N:19]([CH3:22])[CH2:20][CH2:21]1)[C:6]([O:8][CH2:9][CH3:10])=[O:7]
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

5

Edukt 3

HCID 944Nitric AcidHCID 6422Trifluoroacetic acidHCID 21874826Ethyl 3-methoxy-4-((1-methylpiperidin-4-yl)methoxy)benzoate

Produkt 1

HCID 21874808Ethyl 5-methoxy-4-((1-methylpiperidin-4-yl)methoxy)-2-nitrobenzoateAusbeute 90,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel
2×

Versuchsvorschrift

A solution of ethyl 3-methoxy-4-(1-methylpiperidin-4-ylmethoxy)benzoate (30.6 g, 89 mmol) in methylene chloride (75 ml) was cooled to 0–5° C. TFA (37.5 ml) was added followed by the dropwise addition over 15 minutes of a solution of fuming 24N nitric acid (7.42 ml, 178 mmol) in methylene chloride (15 ml). After completion of the addition, the solution was allowed to warm up and stirred at ambient temperature for 2 hours. The volatiles were removed under vacuum and the residue was dissolved in methylene chloride (50 ml). The solution was cooled to 0–5° C. and ether was added. The precipitate was collected by filtration, and dried under vacuum at 50° C. The solid was dissolved in methylene chloride (500 ml) and 3M hydrogen chloride in ether (30 ml) was added followed by ether (500 ml). The solid was collected by filtration and dried under vacuum at 50° C. to give ethyl 3-methoxy-4-(1-methylpiperidin-4-ylmethoxy)-6-nitrobenzoate (28.4 g, 82%).

Aufarbeitung

  1. additionfollowed by the dropwise addition over 15 minutes of a solution
  2. additionAfter completion of the addition
  3. temperatureto warm up
  4. customThe volatiles were removed under vacuum
  5. dissolutionthe residue was dissolved in methylene chloride (50 ml)
  6. temperatureThe solution was cooled to 0–5° C.
  7. additionether was added
  8. filtrationThe precipitate was collected by filtration
  9. customdried under vacuum at 50° C
  10. dissolutionThe solid was dissolved in methylene chloride (500 ml)
  11. addition3M hydrogen chloride in ether (30 ml) was added
  12. filtrationThe solid was collected by filtration
  13. customdried under vacuum at 50° C.

Quellen und Nachweise

ORD-Eintrag
ord-de25659acb2940b3b49350e9d28594fe
Quelldatensatz
uspto-grants-2007_02
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07173038B1

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