Triethylamine → (4aR,8aR)-6-benzyl 1-tert-butyl hexahydro-1H-pyrido[3,4-b][1,4]oxazine-1,6(7H)-dicarboxylate

HRID 81119Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 81119
[N:1]1([C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])[CH2:6][CH2:5][O:4][C@@H:3]2[CH2:7][NH:8][CH2:9][CH2:10][C@@H:2]12.Cl[C:19]([O:21][CH2:22][C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1)=[O:20].C(N(CC)CC)C>C(Cl)Cl>[N:1]1([C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])[CH2:6][CH2:5][O:4][C@@H:3]2[CH2:7][N:8]([C:19]([O:21][CH2:22][C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=3)=[O:20])[CH2:9][CH2:10][C@@H:2]12

Komponenten

5

Edukt 3

HCID 8471TriethylamineHCID 10387Benzyl chloroformateHCID 86724487tert-butyl (4aR,8aR)-octahydro-1H-pyrido[3,4-b][1,4]oxazine-1-carboxylate

Produkt 1

HCID 86724486(4aR,8aR)-6-benzyl 1-tert-butyl hexahydro-1H-pyrido[3,4-b][1,4]oxazine-1,6(7H)-dicarboxylate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To tert-butyl (4aR,8aR)-octahydro-1H-pyrido[3,4-b][1,4]oxazine-1-carboxylate (250 mg, 1.03 mmol) dissolved in DCM (2 mL) was added benzyl chloroformate (0.21 mL, 1.44 mmol). Triethylamine (0.4 mL, 2.89 mmol) was added slowly and stirred for 3 hours at room temperature. The reaction was quenched with saturated aqueous sodium bicarbonate. The aqueous layer was extracted with DCM, and the combined organic layers were dried over sodium sulfate, filtered, and concentrated to afford (4aR,8aR)-6-benzyl 1-tert-butyl hexahydro-1H-pyrido[3,4-b][1,4]oxazine-1,6(7H)-dicarboxylate. 1H NMR (500 MHz, CDCl3) δ 7.40-7.30 (m, 5H), 5.12 (s, 2H), 4.40-4.15 (m, 1H), 3.93-3.87 (m, 1H), 3.86-3.79 (m, 1H), 3.77-3.71 (m, 1H), 3.42-3.29 (m, 2H), 3.19-3.13 (m, 1H), 2.81-2.48 (m, 2H), 1.76-1.66 (m, 1H), 1.58 (s, 2H), 1.45 (s, 9H).

Aufarbeitung

  1. customThe reaction was quenched with saturated aqueous sodium bicarbonate
  2. extractionThe aqueous layer was extracted with DCM
  3. dry with materialthe combined organic layers were dried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-9085e995acb84b99bbf1bbe1a9a5a628
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08846657B2

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