Syntheses of strychnos- and aspidospermatan-type alkaloids. 5. Total syntheses of (±)-echitamidine and 20-epi- and 19-epi-20-epi-echitamidine

Article abstract of DOI:10.1021/jo00099a029

Intramolecular Diels-Alder reactions, at two stages in the reaction sequence, provided total syntheses of the racemate of the hypotensive alkaloid echitamidine (8) and of its C-19,20 and C-20 epimers 9a and 9b.