Reaktionsgleichung
CCCCC/C=C\C[C@@H](O)/C=[CH:11]/[CH:12]=[CH:13]/[CH:14]=[CH:15]\[C@@H:16](O)[CH2:17][CH2:18][CH2:19][C:20]([OH:22])=O.C1[O:27][C@H]1CO.O=C1O[C@H:36]([C@H:38]([CH2:40][OH:41])O)[C:34](O)=[C:32]1O.C#CCCCCC>CCOCC>[O:41]1[CH2:32][CH2:34][CH2:36][CH2:38][CH:40]1[O:22][CH2:20][C@H:19]([OH:27])[CH2:18][C:17]#[C:16][CH2:15][CH2:14][CH2:13][CH2:12][CH3:11]Komponenten
Edukt 4
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
The starting material for the process of this invention, compound 2, can be prepared as described in Nicolaou, K. C. et al., "A General and Stereocontrolled Total Synthesis of Leukotriene B4 and Analogues," J. Am. Chem. Soc., 106, 3548 (1984) or Hanson, R. M. and Sharpless, K. B., J. Org. Chem., 51 1922 (1986). Briefly, optically active (S)-glycidol THP ether is prepared from ascorbic acid as disclosed in Takano, S., Numata, H., Ogasawara, K., Heterocycles, 19, 237 (1982) and Baldwin, J. J., Raab, A. W., Mensler, K., Arison, B. H., McClure, D. E., J. Org. Chem., 43, 4876 (1978). The ether is reacted (-78-25° C.) with two equivalents of the anion of 1-heptyne (1.0 equiv. of n-BuLi, 1.0 equiv. of TMEDA and THF, -78° C.) to afford a-[(tetrahydro-2H-pyran-2-yl)oxy] dec-4-yn-2(R)-ol which is then silylated (t-BuPh2SiCl, imidazole, DMF) to , compound 2.
Quellen und Nachweise
- ORD-Eintrag
- ord-b3da12420bdf42c095ff8497ef59c07f
- Quelldatensatz
- uspto-grants-1992_05
- Patentnummer
- US05110949
Verknüpfte Notizen
Wird geladen…