Acetic Acid → HCID 69332948, Verbindung

HRID 350582Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 350582
[F:1][CH:2]1[CH:7]([CH2:8][C:9]([O:11][CH2:12][CH3:13])=[O:10])[CH2:6][CH2:5][NH:4][CH2:3]1.[C:14]([O:18][C:19]([N:21]([CH2:23][CH:24]=O)[CH3:22])=[O:20])([CH3:17])([CH3:16])[CH3:15].[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+].C(O)(=O)C>C1COCC1>[F:1][CH:2]1[CH:7]([CH2:8][C:9]([O:11][CH2:12][CH3:13])=[O:10])[CH2:6][CH2:5][N:4]([CH2:24][CH2:23][N:21]([C:19]([O:18][C:14]([CH3:15])([CH3:17])[CH3:16])=[O:20])[CH3:22])[CH2:3]1

Komponenten

6

Edukt 4

HCID 176Acetic AcidHCID 5049666Sodium triacetoxyborohydrideHCID 10725881tert-butyl N-methyl-N-(2-oxoethyl)carbamateHCID 23511873Ethyl 3-fluoro-4-piperidinylacetate

Produkt 1

HCID 69332948HCID 69332948, VerbindungAusbeute 56 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a solution of ethyl 3-fluoro-4-piperidinylacetate (230 mg, 1.22 mmol) and 2-(N-tert-butoxy carbonyl-N-methylamino)acetaldehyde (211 mg, 1.22 mmol) in THF (5 mL) was added NaBH(OAc)3 (386 mg, 1.82 mmol) and acetic acid (70.0 mL, 1.22 mmol) at room temperature After being stirred for 24 hr, the reaction mixture was quenched by the addition of sat. NaHCO3 solution and extracted with EtOAc. The extracts were washed with brine, dried over Na2CO3, and concentrated to dryness. Chromatography of the residue with CHCl3-MeOH (6:1, v/v) as eluent gave ethyl 3-fluoro-1-[2-(N-tert-butoxycarbonyl-N-methylamino)ethyl]-4-piperidinylacetate (236 mg, 56%) as a reddish oil. 1H-NMR (CDCl3) δ 1.25 (t, J=7.1 Hz, 3H), 1.45 (s, 9H), 1.53 1.79 (m, 2H), 1.90–2.09 (m, 2H), 2.15 (dd, J=16.4, 7.1 Hz, 1H), 2.45–2.58 (m, 2H), 2.87 (s, 3H), 2.90–2.99 (m, 2H), 3.20 (m, 1H), 3.24–3.45 (m, 2H), 4.14 (q, J=7.1 Hz, 2H), 4.61, 4.73 (each broad s, 1H); ESI-MS m/z 347.

Aufarbeitung

  1. customthe reaction mixture was quenched by the addition of sat. NaHCO3 solution
  2. extractionextracted with EtOAc
  3. washThe extracts were washed with brine
  4. dry with materialdried over Na2CO3
  5. concentrationconcentrated to dryness

Quellen und Nachweise

ORD-Eintrag
ord-6de074db09c448e2af18ce4da757ab8d
Quelldatensatz
uspto-grants-2007_02
Patentnummer
US07179819B2

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