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Acetic Acid → (R)-1-methyl-2-(3-nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine

HRID 491598
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 491598
[N+:1]([C:4]1[CH:5]=[C:6]([CH:14]=[C:15]([C:17]([F:20])([F:19])[F:18])[CH:16]=1)[O:7][CH2:8][CH:9]1[CH2:13][CH2:12][CH2:11][NH:10]1)([O-:3])=[O:2].C=O.[BH3-][C:24]#N.[Na+].CC(O)=O>CC#N>[CH3:24][N:10]1[CH2:11][CH2:12][CH2:13][C@@H:9]1[CH2:8][O:7][C:6]1[CH:14]=[C:15]([C:17]([F:20])([F:18])[F:19])[CH:16]=[C:4]([N+:1]([O-:3])=[O:2])[CH:5]=1
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 4

HCID 176Acetic AcidHCID 712FormaldehydeHCID 5003444Sodium cyanoborohydrideHCID 219594182-(3-Nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine

Produkt 1

HCID 69017339(R)-1-methyl-2-(3-nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342
Acetonitrile
Lösungsmittel

Versuchsvorschrift

2-(3-Nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine (6 mmol) was dissolved in CH3CN (20 mL) and formaldehyde (2.4 mL, 37% aqueous) was added. NaBH3CN (607 mg) was added, an exotherm was observed. The pH was monitored every 15 min and adjusted to ˜7 with AcOH. After 45 min, the mixture was concentrated in vacuo and the residue was dissolved in EtOAc, washed with 6 N NaOH, 1 N NaOH, and 2 N HCl (3×). The acid washings were combined, adjusted to ˜pH 10 with solid Na2CO3 and extracted with EtOAc (2×). The EtOAc fractions were combined, dried with Na2SO4, and purified with flash chromatography (SiO2, 95:5:0.5 CH2Cl2:MeOH:NH4OH) to afford the title compound.

Aufarbeitung

  1. concentrationthe mixture was concentrated in vacuo
  2. dissolutionthe residue was dissolved in EtOAc
  3. washwashed with 6 N NaOH, 1 N NaOH, and 2 N HCl (3×)
  4. extractionextracted with EtOAc (2×)
  5. dry with materialdried with Na2SO4
  6. custompurified with flash chromatography (SiO2, 95:5:0.5 CH2Cl2:MeOH:NH4OH)

Quellen und Nachweise

ORD-Eintrag
ord-700091134dc849c38d7b8cb49d0944b5
Quelldatensatz
uspto-grants-2009_05
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07531553B2

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