Bromophenols Coupled with Derivatives of Amino Acids and Nucleosides from the Red Alga <i>Rhodomela </i><i>c</i><i>onfervoides</i>
作者:Jielu Zhao、Ming Ma、Sujuan Wang、Shuai Li、Peng Cao、Yongchun Yang、Yang Lü、Jiangong Shi、Nianjun Xu、Xiao Fan、Lan He
DOI:10.1021/np040234m
日期:2005.5.1
Three new bromophenols coupled with pyroglutamic acid derivatives and one bromophenol coupled with deoxyguanosine were obtained from the red alga Rhodomela confervoides. By spectroscopic methods including 2D NMR and single-crystal X-ray structure analysis their structures were elucidated as N-(2,3-dibromo-4,5-dihydroxybenzyl)methyl pyroglutamate (1), N-(2,3-dibromo-4,5-dihydroxybenzyl)pyroglutamic acid (2), N-[3-bromo-2-(2,3-dibromo-4,5-dihydroxybenzyl)-4,5-dihydroxybenzyllmethyl pyroglutamate (3), and 2-N-(2,3-dibromo-4,5-dihydroxybenzylamino)deoxyguanosine (4), respectively. Compounds 1-4 were evaluated against several microorganisms and human cancer cell lines, but found inactive. To our knowledge this is the first report of bromophenols coupled with amino acid or nucleoside derivatives through the C-N bond.