Chloroform → (3R,5S)-5-(((tert-Butyldimethylsilyl)oxy)methyl)pyrrolidin-3-ol

HRID 1826113Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1826113
C(OC([N:11]1[CH2:15][C@H:14]([OH:16])[CH2:13][C@H:12]1[CH2:17][O:18][Si:19]([C:22]([CH3:25])([CH3:24])[CH3:23])([CH3:21])[CH3:20])=O)C1C=CC=CC=1.C(Cl)(Cl)Cl.C(OC(N1C[C@H](O)C[C@H]1C(OC)=O)=O)C=C>C(OCC)(=O)C.C(O)C.[Pd]>[Si:19]([O:18][CH2:17][C@@H:12]1[CH2:13][C@@H:14]([OH:16])[CH2:15][NH:11]1)([C:22]([CH3:25])([CH3:24])[CH3:23])([CH3:21])[CH3:20]

Komponenten

7

Edukt 3

HCID 6212ChloroformHCID 10633157(2S,4R)-1-allyloxycarbonyl-2-methoxycarbonyl-4-hydroxypyrrolidineHCID 57280098benzyl (2S,4R)-2-{[(tert-butyldimethylsilyl)oxy]methyl}-4-hydroxypyrrolidine-1-carboxylate

Produkt 1

HCID 11481662(3R,5S)-5-(((tert-Butyldimethylsilyl)oxy)methyl)pyrrolidin-3-ol

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 23938PalladiumKatalysatorHCID 702EthanolLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

A slurry of 10% Pd/C (190 mg) in ethyl acetate (20 mL) was added to a solution of TBDMS ether (48) (1.90 g, 5.19 mmol) in ethanol (100 mL). The reaction mixture was hydrogenated (Parr apparatus) for 16 h. The catalyst was removed by vacuum filtration through Celite and excess solvent was evaporated under reduced pressure to give a yellow oil in quantitative yield (1.20 g, 100%). [α]22.2D=+35.6° (c 0.042, CHCl3). 1H NMR (CDCl3): δ −(0.07-0.08) (m, 6H, H1′, H2′), 0.82 (s, 9H, H3′, H4′, H5′), 1.68-1.73 (m, 2H, H1,), 2.99-3.11 (m, 2H, H11), 3.47-3.50 (m, 3H, H11a, H3), 4.09 (bs, 1H, NH or OH), 4.32 (bs, 1H, NH or OH). 13C NMR (CDCl): 5-5.4 (C3′, C5′, C6′), 18.1 (C4′), 25.8 (C1′, C2′), 37.4 (C1), 54.6 (C11), 58.1 (C2), 64.6 (C3), 72.2 (C11a). IR (thin film): ν=3330 (OH), 2928, 2857, 1557, 1421, 1331 (C—CH3), 1249 (CH3—Si), 1204 (t-Bu) 1191 (c-Bu), 1100 (Si—O), 1073, 993, 713 cm−1. MS (CI) m/e (relative intensity): 232 (M+., 100), 230 (13), 174 (5), 133 (6), 86 (6).

Aufarbeitung

  1. customfor 16 h
  2. customThe catalyst was removed by vacuum filtration through Celite and excess solvent
  3. customwas evaporated under reduced pressure
  4. customto give a yellow oil in quantitative yield (1.20 g, 100%)

Quellen und Nachweise

ORD-Eintrag
ord-f20e0952d290497f986bbe19dab6fa4b
Quelldatensatz
uspto-grants-2006_05
Patentnummer
US07049311B1

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