Quinoline alkaloids. Part 22. Synthesis of the monoterpenoid quinoline alkaloid, bucharaine
作者:Michael F. Grundon、V. N. Ramachandran、Michael E. Donnelly
DOI:10.1039/p19810000633
日期:——
Reaction of 4-hydroxy-2-quinolone with geranyl chloride gave the geranyl ether (5a), the C-geranyl derivatives (6) and (7), and the vinylhexenyl derivative (8). The geranyl ether was converted into bucharaine (1) by selective hydroxylation and via mono-epoxidation.
Novel Squalene-Hopene Cyclase Inhibitors Derived from Hydroxycoumarins and Hydroxyacetophenones
作者:Giancarlo Cravotto、Gianni Balliano、Silvia Tagliapietra、Simonetta Oliaro-Bosso、Gian Mario Nano
DOI:10.1248/cpb.52.1171
日期:——
Squalene-hopene cyclase (SHC) is a useful model enzyme for predicting molecular interactions with oxidosqualene cyclase (OSC). Structure–activity relationships were investigated for numerous coumarin-derived inhibitors of SHC, and structural simplifications are suggested. Both umbelliferone and 2,4-dihydroxyacetophenone provide convenient starting nuclei for the design of SHC inhibitors. Derivatives bearing an ω-epoxyfarnesyl moiety or just a plain alkyl chain showed an inhibitory effect on a recombinant SHC from Alicyclobacillus acidocaldarius expressed in Escherichia coli.