Inhibitors of sterol synthesis. Synthesis and spectral properties of 3β-hydroxy-5α-cholestan-15-one and its 14β-epimer and their effects on 3-hydroxy-3-methylglutaryl coenzyme A reductase activity
作者:Abdul U. Siddiqui、William K. Wilson、Edward J. Parish、Nicolas Gerst、Frederick D. Pinkerton、George J. Schroepfer
DOI:10.1016/0009-3084(94)90106-6
日期:1994.10
resonance (NMR) spectra; chromatographic methods gave less reliable estimates of purity. NMR data also showed that ring C of the 14 beta sterols is predominantly in a chair conformation. The effects of 2a and 2b on the levels of 3-hydroxy-3-methylglutarylcoenzyme A reductase have been studied in Chinese hamster ovary cells.
Efficient entry to the steroidal 14.ALPHA.-methyl-8-ene system.
作者:Sonoko ARAKI、Sanae EGUCHI、Masuo MORISAKI
DOI:10.1248/cpb.38.1796
日期:——
Treatment of 14α, 15α-epoxy-5α-cholestan-3β-ol trimethylacetate (1b) with boron trifluoride etherate in benzene gave the 8-en-15α-ol (2b) in 75% yield, which was then transformed, by oxidation, methylation and deoxygenation, into 14α-methyl-5α-cholest-8-en-3β-ol (7). 24, 25-Dihydrolanosterol (8) was also prepared by these procedures.