Spokewise Total\nSyntheses of Four <i>Erythrina</i> Alkaloids and Telescoped\nSyntheses of Six Additional Alkaloids

Based on rich sulfur-involving chemical transformations,\na novel\nspokewise synthetic strategy, a subclass of the collective strategies,\nhas been developed to concisely synthesize four erythrina alkaloids\nthrough a single-step transformation from a common synthetic precursor.\nMoreover, six additional erythrina alkaloids have also been synthesized\nby subsequent 1–2 steps chemical transformations. The current\nsynthetic approaches provide a valuable platform for collective total\nsyntheses of erythrina alkaloids and <i>pseudo</i>-natural\nerythrina alkaloids.