Acid-catalyzed intramolecular C-alkylation in .beta.,.gamma.-unsaturated diazomethyl ketones. 3. A simple synthetic route to hexahydro-4,9a-ethano-1H-fluoren-11-ones, hexahydro-6H-pentaleno[6a,1-a]indan-4-ones and hexahydrocyclobuta[j]fluoren-2(1H)-ones
作者:Subhas C. Roy、Gutta O. S. V. Satyanarayana、Usha Ranjan Ghatak
DOI:10.1021/jo00148a023
日期:1982.12
Synthetic studies towards complex diterpenoids. Part 20.1 Total synthesis of the linear abietane o-quinone umbrosone
作者:Keya Ghosh、Usha Ranjan Ghatak
DOI:10.1039/a809579e
日期:——
A simple total synthesis of the rearranged linear abietane diterpenoid o-quinone, umbrosone 1, has been accomplished through trans-1,2,3,4,9,9a-hexahydro-1,1-dimethyl-6-methoxyanthracen-10(4aH)-one 12t.