名称:
A New Glycociamidine Ring Precursor: Syntheses of (Z)-Hymenialdisine, (Z)-2-Debromohymenialdisine, and (±)-endo-2-Debromohymenialdisine
摘要:
[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.