A 28-member focused library, based on the pseudosymmetric template of the marine alkaloids psammaplysenes, was prepared from combinations of components that were, in turn, derived from 4-iodophenol.
Two new dibromotyrosine derivatives from the caribbean sponge pseudoceratina crassa
作者:Katharina E. Kassühlke、D.John Faulkner
DOI:10.1016/s0040-4020(01)96095-8
日期:1991.3
Two novel dibromotyrosine derivatives were isolated from the Caribbeansponge Pseudoceratinacrassa (Hyatt). The structures of ethyl 3,5-dibromo-4-(3′-N,N-dimethylaminopropyloxy)cinnamate (1) and 3,5-dibromo-4-(3′-N,N-dimethylaminopropyloxy)cinnamic acid (2) were proposed on the basis of spectroscopic evidence and were confirmed by synthesis.