Artigo de Periódico
Polyprenylated benzophenones with a tricyclo [4.3.1.13,8]undecane skeleton from Clusia obdeltifolia
Fecha
2004Registro en:
0103-5053
v. 15, n. 4.
Autor
Cruz, Frederico Guare
Teixeira, Josanaide Sant'Ana Ribeiro
Cruz, Frederico Guare
Teixeira, Josanaide Sant'Ana Ribeiro
Institución
Resumen
The hexane extract of Clusia obdeltifolia trunk yielded three new polyprenylated benzophenones 7b-H-11-benzoyl-5a-hydroxy-6,6,10,10-tetramethyl-1-(3-methyl-2-butenyl)tetracyclo [7.3.1.13,1103,7]tetradecane-2,12,14-trione, 8-benzoyl-4a-(1-hydroxy-1-methylethyl)-7,7-dimethyl -1,3-di(3-methyl-2-butenyl)tricyclo[4.3.1.13,8 ]undecane-2,9,11-trione and 7a-H-1-benzoyl-4-hydroxy-3-(3-hydroxy-3methylbutyl)-6,6,13,13-tetramethyl-11- (3-methyl-2-butenyl)-5 -oxatetracyclo[7.3.1.03,704,11 ]tridecane-2,12-dione along with two known polyprenylated benzophenones, sampsonione B and sampsonione G. These benzophenones exhibited a complex tricyclo [4.3.1.13,8]undecane skeleton and their structures were determined from spectral data and comparison with those of previously reported compounds.