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Examination of the hydroalcoholic extract of the leaves of Aptenia cordifolia has afforded three cinnamic acid amides and two lignanamides. Structures were established on the basis of spectroscopic data, including 2D-NMR analyses.
Together with the known luffarin V and 6 Z -luffarin V, two new sesterterpenes ( 1a and 2 ), related to luffarins have been isolated from the sponge Fasciospongia cavernosa , collected in the Northern Adriatic Sea. The structures of the new compounds were proposed on the basis of spectroscopic...
A formal total synthesis of the sesquiterpene (±)-herbertenediol and its dimers mastigophorenes A–D has been accomplished, starting from vanillin via 2,3-dimethoxy-5-methylbenzaldehyde. A combination of Claisen rearrangement and ring-closing metathesis reactions were employed for the...
The one-pot reaction of 1-tetralone with nitriles in the presence of triflic anhydride affords in good yields 2,4-disubstituted 5,6-dihydrobenzo( h )quinazolines, which oxidation with DDQ leads to the corresponding benzo( h )quinazolines. 2-Tetralone undergoes identical process forming...
The reaction of different carbonyl compounds and imines with a mixture of iron(II) chloride tetrahydrate, an excess of lithium powder, and a catalytic amount of 4,4′-di- tert -butylbiphenyl (DTBB, 5 mol%) in THF at room temperature, led to the formation of the corresponding alcohols and amines,...
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