Diisopropylethylamine → HCID 59605945, Verbindung

HRID 1922655Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1922655
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([NH:14][CH3:15])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[O:16]1[CH2:21][CH2:20][CH2:19][C:18](=O)[CH2:17]1.CCN(C(C)C)C(C)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C(Cl)Cl>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][CH:11]([N:14]([CH3:15])[CH:19]2[CH2:20][CH2:21][O:16][CH2:17][CH2:18]2)[CH2:12][CH2:13]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Komponenten

6

Edukt 4

HCID 81531DiisopropylethylamineHCID 901092H-Pyran-3(4H)-one, dihydro-HCID 5049666Sodium triacetoxyborohydrideHCID 15380702tert-Butyl 4-(methylamino)piperidine-1-carboxylate

Produkt 1

HCID 59605945HCID 59605945, VerbindungAusbeute 36,4 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Versuchsvorschrift

A mixture of 4-methylaminopiperidine-1-carboxylic acid tert-butyl ester (200 mg, 0.93 mmol), tetrahydropyran-3-one (187 mg, 1.87 mmol), 4 Å powdered molecular sieves (550 mg) and DIPEA (323 μl, 241 mg, 1.87 mmol) in DCM (10 mL) was stirred at room temperature for 30 min before the addition of sodium triacetoxyborohydride (396 mg, 1.87 mmol). The reaction mixture was stirred at room temperature for 16 h then diluted with DCM and washed with H2O. The organic phase was dried (Na2SO4) and concentrated in vacuo. The resulting residue was purified by column chromatography (Si—PCC, MeOH:DCM, 0-10%) affording 4-[Methyl(tetrahydropyran-4-yl)amino]piperidine-1-carboxylic acid tert-butyl ester as an oil (101 mg, 36%). 1H NMR (CDCl3, 300 MHz): δ 4.24-4.07 (m, 2H); 4.06-3.96 (m, 2H); 3.43-3.32 (m, 2H); 2.78-2.63 (m, 4H); 2.25 (s, 3H); 1.77-1.60 (m, 8H); 1.46 (s, 9H).

Aufarbeitung

  1. washwashed with H2O
  2. dry with materialThe organic phase was dried (Na2SO4)
  3. concentrationconcentrated in vacuo
  4. customThe resulting residue was purified by column chromatography (Si—PCC, MeOH:DCM, 0-10%)

Quellen und Nachweise

ORD-Eintrag
ord-c47f41df39404b278c8c25ebddaee5e2
Quelldatensatz
uspto-grants-2012_05
Patentnummer
US08173650B2

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