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Tetrabutylammonium Fluoride → tert-butyl N-tert-butoxycarbonyl-N-[(3S,7S,8R,9S)-8-hydroxy-9-methyl-7-(1-naphthylmethyl)-2-oxo-1,5-dioxonan-3-yl]carbamate

HRID 58957
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 58957
[C:1]([O:5][C:6]([N:8]([C@H:16]1[CH2:24][O:23][CH2:22][C@H:21]([CH2:25][C:26]2[C:35]3[C:30](=[CH:31][CH:32]=[CH:33][CH:34]=3)[CH:29]=[CH:28][CH:27]=2)[C@@H:20]([O:36][Si](C(C)C)(C(C)C)C(C)C)[C@H:19]([CH3:47])[O:18][C:17]1=[O:48])[C:9](=[O:15])[O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:7])([CH3:4])([CH3:3])[CH3:2].CCCC[N+](CCCC)(CCCC)CCCC.[F-]>C1COCC1.[Na+].[Cl-]>[C:11]([O:10][C:9]([N:8]([C@H:16]1[CH2:24][O:23][CH2:22][C@H:21]([CH2:25][C:26]2[C:35]3[C:30](=[CH:31][CH:32]=[CH:33][CH:34]=3)[CH:29]=[CH:28][CH:27]=2)[C@@H:20]([OH:36])[C@H:19]([CH3:47])[O:18][C:17]1=[O:48])[C:6](=[O:7])[O:5][C:1]([CH3:3])([CH3:4])[CH3:2])=[O:15])([CH3:12])([CH3:13])[CH3:14]
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Komponenten

5

Edukt 2

HCID 2724141Tetrabutylammonium FluorideHCID 123241785tert-butyl N-tert-butoxycarbonyl-N-[(3S,7S,8R,9S)-9-methyl-7-(1-naphthylmethyl)-2-oxo-8-triisopropylsilyloxy-1,5-dioxonan-3-yl]carbamate

Produkt 1

HCID 117974424tert-butyl N-tert-butoxycarbonyl-N-[(3S,7S,8R,9S)-8-hydroxy-9-methyl-7-(1-naphthylmethyl)-2-oxo-1,5-dioxonan-3-yl]carbamateAusbeute 72 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 5234
Sodium Chloride
Lösungsmittel
HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a solution of tert-butyl N-tert-butoxycarbonyl-N-[(3S,7S,8R,9S)-9-methyl-7-(1-naphthylmethyl)-2-oxo-8-triisopropylsilyloxy-1,5-dioxonan-3-yl]carbamate (2.54 g, 3.70 mmol) in THF (18.5 ml) was added TBAF (1.94 g, 7.41 mmol, 1M in THF) at room temperature. The reaction was stirred for 3.5 h, diluted with a ½ sat. aqueous NaCl solution (10 mL), and extracted with EtOAc (3×10 mL). The combined extracts were dried over Na2SO4, filtered, and concentrated to dryness under reduced pressure. The resulting clear oil was purified by flash chromatography (SiO2, 0→50% acetone/hexanes) to afford tert-butyl N-tert-butoxycarbonyl-N-[(3S,7S,8R,9S)-8-hydroxy-9-methyl-7-(1-naphthylmethyl)-2-oxo-1,5-dioxonan-3-yl]carbamate (1.41 g, 72%) as a white solid: 1H NMR (400 MHz, CDCl3) δ 8.11 (dd, J=8.5, 1.4 Hz, 1H), 7.87-7.79 (m, 1H), 7.72 (d, J=8.1 Hz, 1H), 7.54-7.41 (m, 2H), 7.42-7.27 (m, 2H), 5.19 (dd, J=8.8, 5.7 Hz, 1H), 5.00-4.88 (m, 1H), 4.10 (dd, J=11.9, 5.8 Hz, 1H), 3.89 (dd, J=12.0, 8.7 Hz, 1H), 3.68-3.51 (m, 4H), 2.79 (t, J=12.2 Hz, 1H), 2.58-2.51 (m, 1H), 2.15 (q, J=8.7, 7.4 Hz, 1H), 1.51 (d, J=6.4 Hz, 3H), 1.46 (s, 18H); 13C NMR (101 MHz, CDCl3) δ 169.95, 152.69, 135.84, 134.02, 132.04, 128.77, 127.46, 127.16, 126.03, 125.56, 125.25, 124.04, 83.17, 77.69, 76.26, 73.23, 70.87, 57.38, 46.90, 33.38, 27.92, 18.67; ESIMS m/z 553 ([M+Na]+).

Aufarbeitung

  1. extractionextracted with EtOAc (3×10 mL)
  2. dry with materialThe combined extracts were dried over Na2SO4
  3. filtrationfiltered
  4. concentrationconcentrated to dryness under reduced pressure
  5. customThe resulting clear oil was purified by flash chromatography (SiO2, 0→50% acetone/hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-1a0bd112c5904656af22358033a8d61c
Quelldatensatz
uspto-grants-2016_09
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US09439422B2

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