A New Glycociamidine Ring Precursor: Syntheses of (<i>Z</i>)-Hymenialdisine, (<i>Z</i>)-2-Debromohymenialdisine, and (±)-<i>endo</i>-2-Debromohymenialdisine
作者:Gianluca Papeo、Helena Posteri、Daniela Borghi、Mario Varasi
DOI:10.1021/ol052266m
日期:2005.12.1
[GRAPHICS]The synthesis of the C-1,H-5 marine sponge alkaloids, (Z)-hymenialdisine and (Z)-2-debromohymenialdisine, is described. A key step was the condensation between aldisine or its monobromo derivative and a new, efficient imidazolinone-based glycociamidine precursor. In the first case, the main product turned out to be the unprecedented (+/-)-endo-2-debromohymenialdisine.