[Show abstract][Hide abstract] ABSTRACT: In the title compound, C(8)H(3)F(4)NO(3), the carb-oxy group lies nearly in the plane of the ring with a C-C-C-O torsion angle of -10.5 (4)°. The carbamoyl group is almost perpendic-ular to the benzene ring [C-C-C-O torsion angle = 82.2 (4) °]. In the crystal, molecules are linked via O-H⋯O and N-H⋯O hydrogen bonds involving the carbamoyl and carb-oxy groups.
[Show abstract][Hide abstract] ABSTRACT: Two new pentahydroxylated steroids, (3β,12β,16β,23E)-cholesta-5,23-diene-3,12,16,20,25-pentaol (1) and (3β,12β,16β)-cholesta-5,25(26)-diene-3,12,16,20,24-pentaol (2), were isolated from the EtOH extract of the South China Sea gorgonian Subergorgia suberosa. In addition, four known steroids were detected. The structures of these compounds were established by spectroscopic methods and comparison of their data with those of the related known compounds. In addition, the cyctotoxicities of the compounds were evaluated against selected cancer cell lines.
[Show abstract][Hide abstract] ABSTRACT: The first total synthesis of the furanolactam fuscain is reported. The key step in the synthesis was the formation of seven-membered lactam by acylation of a furan ring using the mild Lewis acid CuSO4·5H2O.
Journal of Chemical Research 01/2012; 36(12). · 0.70 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: To study the secondary metabolites from the marine sponge Phakellia fusca epiphytic fungi.
The compounds were isolated by column chromatography over silica gel and purified by Sephadex LH-20 column chromatography and preparative TLC. The structures were elucidated by means of physiochemical properties and spectroscopic analyses.
Four compounds were separated and identified as: cyclo-(L-Val-L-Pro) (1), cyclo-(L-Phe-L-Pro) (2), cyclo-(L-Tyr-L-Pro) (3), cyclo-(3-hydroxy-4-methyldecanoyl-Gly-L-Val-D-Leu-L-Ala-L-Phe) (4).
Compounds 1-4 are obtained from the marine sponge Phakellia fusca epiphytic fungi for the first time.
Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials 12/2011; 34(12):1877-9.