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Diisopropylethylamine → (S)-Methyl 6-amino-2-((tert-butoxycarbonyl)amino)hexanoate

HRID 1625695
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1625695
[NH2:1][CH2:2][CH2:3][CH2:4][CH2:5][C@H:6]([NH:11][C:12]([O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:13])[C:7]([O:9][CH3:10])=[O:8].[O:19]=[C:20]1[CH2:23][CH:22]([C:24](O)=[O:25])[CH2:21]1.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C>CN(C=O)C.CCOC(C)=O>[NH2:1][CH2:2][CH2:3][CH2:4][CH2:5][C@H:6]([NH:11][C:12]([O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:13])[C:7]([O:9][CH3:10])=[O:8].[C:15]([O:14][C:12]([NH:11][C@@H:6]([CH2:5][CH2:4][CH2:3][CH2:2][NH:1][C:24]([CH:22]1[CH2:23][C:20](=[O:19])[CH2:21]1)=[O:25])[C:7]([O:9][CH3:10])=[O:8])=[O:13])([CH3:18])([CH3:17])[CH3:16]
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

8

Edukt 4

HCID 81531DiisopropylethylamineHCID 49133583-Oxocyclobutane-1-carboxylic acidHCID 7018772(S)-Methyl 6-amino-2-((tert-butoxycarbonyl)amino)hexanoateHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)

Produkt 2

HCID 7018772(S)-Methyl 6-amino-2-((tert-butoxycarbonyl)amino)hexanoate
HCID 58481198(S)-methyl 2-(tert-butoxycarbonylamino)-6-(3-oxocyclobutanecarboxamido)hexanoate

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideLösungsmittel2×HCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

A 1M stock solution of (S)-methyl 6-amino-2-(tert-butoxycarbonylamino)hexanoate in 20 mL DMF was prepared, and used. A 2 mL aliquot of the (S)-methyl 6-amino-2-(tert-butoxycarbonylamino)hexanoate stock solution, 3-oxocyclobutanecarboxylic acid (2) (Parkway *BX-102, 283 mg), HATU (800 mg), DIEA (1.0 mL) and 8 mL DMF were combined in a 40 mL glass vial, and stirred at ambient temperature overnight. The LC-MS analysis revealed a complete reaction. The reaction mixture was diluted with EtOAc, washed successively with water, sat aq. NaCl, dried over MgSO4, filtered and concentrated under reduced pressure. The crude material was purified by silica gel flash chromatography (hexanes/EtOAc), affording (S)-methyl 2-(tert-butoxycarbonylamino)-6-(3-oxocyclobutanecarboxamido)hexanoate (TU3000-140) as a clear viscous oil. MS (ESI+): calcd. 379.18. found 379.20 (MNa+), calcd. 257.15. found 257.20((M-Boc)H+). H-NMR (400 MHz, DMSO-d6):1.245 (4H, m), 1.371 (9H, s), 1.579 (2H, m), 3.065 (3H, m), 3.135 (4H, m), 3.608 (3H, s), 3.895 (1H, m), 7.209 (1 h, d, J=8.0 Hz), 8.123 (1H, t, J=5.4 Hz). C-NMR (100 MHz, DMSO-d6): 22.850, 27.185, 28.111, 28.551, 30.209, 38.276, 50.859, 51.639, 53.412, 53.529, 78.137, 155.507, 172.992, 173.167, 205.576.

Aufarbeitung

  1. customa complete reaction
  2. washwashed successively with water
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe crude material was purified by silica gel flash chromatography (hexanes/EtOAc)

Quellen und Nachweise

ORD-Eintrag
ord-32cd3f556db648e5935dc9d00fd6ec01
Quelldatensatz
uspto-grants-2014_07
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08785151B2

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