Cyclomanganation of diterpenoids; functionalization of C14
作者:Richard C. Cambie、Michael R. Metzler、Peter S. Rutledge、Paul D. Woodgate
DOI:10.1016/0022-328x(90)85462-8
日期:1990.1
Orthomanganated complexes have been made from carbonyl derivatives of the ring-C aromatic diterpenoids podocarpicacid and dehydroabietic acid. Activation of these complexes with Me3NO followed by coupling reactions with various substituted alkenes results in efficient substitution at C14. In some cases a tetracyclic indenol derivative is formed directly. Insertion of an alkyne also leads to cyclopentaannulation