Reaktionsgleichung
[CH2:1]([C@H:8]1[CH2:12][O:11][C:10](=[O:13])[N:9]1[C:14](=[O:19])[CH2:15][O:16][CH2:17][CH3:18])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH2:20]([O:27][C:28]1[CH:35]=[CH:34][C:31]([CH:32]=[O:33])=[C:30]([C:36]([F:39])([F:38])[F:37])[CH:29]=1)[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1.[O-]S(C(F)(F)F)(=O)=O.C([B+]CCCC)CCC>C(N(CC)CC)C>[CH2:1]([C@H:8]1[CH2:12][O:11][C:10](=[O:13])[N:9]1[C:14](=[O:19])[C@@H:15]([O:16][CH2:17][CH3:18])[C@@H:32]([C:31]1[CH:34]=[CH:35][C:28]([O:27][CH2:20][C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)=[CH:29][C:30]=1[C:36]([F:37])([F:38])[F:39])[OH:33])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1Komponenten
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
In analogy to the procedure described in example 1 a], (S)-4-benzyl-3-ethoxyacetyl-oxazolidin-2-one (for the preparation of (S)-4-benzyl-3-ethoxyacetyl-oxazolidin-2-one see: D. Haigh, H. C. Birrell, B. C. C. Cantello, D. S. Eggleston, R. C. Haltiwanger, R. M. Hindley, A. Ramaswamy, N. C. Stevens, Tetrahedron: Asymmetry 1999, 10, 1353-1367) was reacted with 4-benzyloxy-2-trifluoromethyl-benzaldehyde in the presence of triethylamine and di-n-butylboron triflate to give (S)-4-benzyl-3-[(2S,3R)-3-(4-benzyloxy-2-trifluoromethyl-phenyl)-2-ethoxy-3-hydroxy-propionyl]-oxazolidin-2-one as colorless liquid. According to 1H-NMR spectroscopy, one of the four isomers is strongly predominating. The configuration was tentatively assigned as 2S,3R according to D. Haigh et al., Tetrahedron: Asymmetry 1999, 10, 1353-1367.
Quellen und Nachweise
- ORD-Eintrag
- ord-5e14ff88f7014ad287707ab08f759c17
- Quelldatensatz
- uspto-grants-2005_11
- Patentnummer
- US06969725B2
Verknüpfte Notizen
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