A Novel Approach to Bicyclic Alkaloids Using a Tandem Diastereoselective Acyliminocyclization and Retro Diels–Alder Reaction Sequence. Synthesis of (+)-Indolizidine and (+)-Laburnine
作者:Yoshitsugu Arai、Tohru Kontani、Toru Koizumi
DOI:10.1246/cl.1991.2135
日期:1991.12
A new approach to a diastereoselective cationic cyclization by stereocontrol due to the bicyclo[2.2.1]heptene moiety in a chiral γ-hydroxy lactam is described. The diastereoselective reaction followed by Diels–Alder cycloreversion has been successfully applied to a chiral synthesis of (+)-indolizidine and (+)-laburnine (=trachelanthamidine).