A Synthesis of Some Novel 2-Phenyl- and 5-Bromo-substituted Aplysinopsin Analogues

5-(2-Phenyl-1H-indol-3-ylmethylene)-2-thioxoimidazolidin-4-one (2) and its oxo derivatives as well as some novel 5-bromoaplysinopsin analogues were synthesized employing dimethylamine substitution in N,N-dimethyl-methylideneimidazolidinones (6).