Acetic Acid → 1,1-Dimethylethyl 2-((4-(methoxycarbonyl)phenylmethylamino)methyl)-1-piperidinecarboxylate

HRID 16490

Reaktionsgleichung

Reaktionsgleichung von HRID 16490
[C:1]([N:8]1[CH2:13][CH2:12][CH2:11][CH2:10][CH:9]1[CH2:14][NH2:15])([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].[CH:16]([C:18]1[CH:27]=[CH:26][C:21]([C:22]([O:24][CH3:25])=[O:23])=[CH:20][CH:19]=1)=O.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClC(Cl)C.O>[CH3:25][O:24][C:22]([C:21]1[CH:26]=[CH:27][C:18]([CH2:16][NH:15][CH2:14][CH:9]2[CH2:10][CH2:11][CH2:12][CH2:13][N:8]2[C:1]([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2])=[CH:19][CH:20]=1)=[O:23]

Komponenten

7

Edukt 4

HCID 176Acetic AcidHCID 15294Methyl 4-FormylbenzoateHCID 2756482tert-Butyl 2-(aminomethyl)piperidine-1-carboxylateHCID 5049666Sodium triacetoxyborohydride

Produkt 1

HCID 684891571,1-Dimethylethyl 2-((4-(methoxycarbonyl)phenylmethylamino)methyl)-1-piperidinecarboxylateAusbeute 96,6 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 63651,1-DichloroethaneLösungsmittel

Versuchsvorschrift

A solution of 1-Boc-2-aminomethylpiperidine (429 mg, 2 mmol) and methyl 4-formylbenzoate (329 mg, 2 mmol) in dichloroethane (10 mL) was stirred as acetic acid (180 mg, 3 mmol) and sodium triacetoxyborohydride (487 mg, 2.3 mmol) were added sequentially. The reaction was stirred at ambient temperature for 17 hours. The reaction was poured into water and extracted with methylene chloride (2×). The organic phase was dried over sodium sulfate, filtered, and concentrated. Purification on silica gel using a gradient of ethyl acetate in hexane gave 0.7 g of 1,1-dimethylethyl 2-((4-(methoxycarbonyl)phenylmethylamino)methyl)-1-piperidinecarboxylate.

Aufarbeitung

  1. additionwere added sequentially
  2. extractionextracted with methylene chloride (2×)
  3. dry with materialThe organic phase was dried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customPurification on silica gel using a gradient of ethyl acetate in hexane

Quellen und Nachweise

ORD-Eintrag
ord-1c2642caec064d1e85d8d4390dbe9730
Quelldatensatz
uspto-grants-2010_06
Patentnummer
US07737145B2

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