Octyl isocyanate → (R)-tert-butyl 2-(benzyloxycarbonylamino)-3-((R)-2,3-bis(octylcarbamoyloxy)propylthio)propanoate

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Reaktionsgleichung

[CH2:1]([O:8][C:9]([NH:11][C@@H:12]([CH2:20][S:21][CH2:22][C@H:23]([OH:26])[CH2:24][OH:25])[C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH2:27]([N:35]=[C:36]=[O:37])[CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][CH3:34]>C1C=CC=CC=1.CN(C1C=CN=CC=1)C>[CH2:1]([O:8][C:9]([NH:11][C@@H:12]([CH2:20][S:21][CH2:22][C@H:23]([O:26][C:36](=[O:37])[NH:35][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][CH3:34])[CH2:24][O:25][C:36](=[O:37])[NH:35][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][CH3:34])[C:13]([O:15][C:16]([CH3:17])([CH3:18])[CH3:19])=[O:14])=[O:10])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Komponenten

Reaktionsbedingungen

Temperatur: 40 °C

Versuchsvorschrift

A solution of (R)-tert-butyl 2-(benzyloxycarbonylamino)-3-((R)-2,3-dihydroxypropylthio)propanoate (13) was stirred in anhydrous benzene (0.1 M) under nitrogen at room temperature. Octyl isocyanate (2.02 eq) and DMAP (dimethylaminopyridine, 2.02 eq) were added and the resulting mixture heated to 40° C. and stirred overnight. The reaction mixture was concentrated to remove benzene then reconstituted in DCM and purified by flash chromatography on a COMBIFLASH® system (ISCO) using a gradient of 0-50% EtOAc/Hex to afford the title product as a colorless oil.

Aufarbeitung

concentrationThe reaction mixture was concentrated
customto remove benzene
custompurified by flash chromatography on a COMBIFLASH® system (ISCO)

Quellen und Nachweise

ORD-Eintrag: ord-4c67416f7f804977bcb6f1a295aa57ec
Quelldatensatz: uspto-grants-2014_08
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08808703B2

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