Reaktionsgleichung
Cl[CH2:2][C@H:3]1[O:8][C:7]([CH3:10])([CH3:9])[O:6][C@@H:5]([CH2:11][C:12]([OH:14])=[O:13])[CH2:4]1.[CH3:15][C:16](Cl)([CH3:18])[CH3:17]>C([O-])(=O)C.C([N+](CCCC)(CCCC)CCCC)CCC.CN1CCCC1=O>[C:7]([O:8][CH2:2][C@H:3]1[O:8][C:7]([CH3:10])([CH3:9])[O:6][C@@H:5]([CH2:11][C:12]([O:14][C:16]([CH3:18])([CH3:17])[CH3:15])=[O:13])[CH2:4]1)(=[O:6])[CH3:9]Komponenten
Edukt 1
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 2
Reaktionsbedingungen
- Temperatur
- 85 °C
Versuchsvorschrift
Solid tetra-n-butylammonium acetate prepared in step (e)(i) of Example 1 above (106.2 g, 0.352 mole) was added in one portion to a mechanically stirred solution of the chloride (4R-cis)-6-(chloromethyl)-2,2-dimethyl-1,3-dioxane-4-acetic acid, 1,1-dimethylethyl ester prepared in step (d) of Example 1 above (32.7 g, 0.117 mole) in HPLC grade 1-methyl-2-pyrrolidinone (471 ml) under argon. The resulting solution was stirred at 85° C. (internal temperature). After 30 to 60 minutes the reaction mixture became homogeneous and brown in color. The progress of the reaction was followed by TLC and GC analysis. (TLC: Rf =0.54 for the title compound; Rf =0.63 for the chloride starting material (silica gel, Ethyl acetate:Hexane, 1:1, visualization by Ce(SO4)2 spray).) After 9 hours the reaction was completed.
Quellen und Nachweise
- ORD-Eintrag
- ord-dcc8fdcf516f4de2951ab062d0b48ccd
- Quelldatensatz
- uspto-grants-1994_01
- Patentnummer
- US05278313
Verknüpfte Notizen
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