Concise enantiospecific synthesis of the key intermediate for heteroyohimbine alkaloids: formal synthesis of ajmalicine and 19-epi-ajmalicine
Abstract
Concise enantiospecific synthesis of the key intermediate for ajmalicine 1 and 19-epi-ajmalicine 2 has been achieved starting from a chiral cyclopentanone derivative, easily derived from (–)-carvone.