Rotatory dispersion and circular dichroism studies of some α-tetralones
作者:R.C. Cambie、L.N. Mander、A.K. Bose、M.S. Manhas
DOI:10.1016/s0040-4020(01)93227-2
日期:1964.1
The rotatory dispersion and circular dichroism spectra of several ketones conjugated with an aromatic ring (derived from diterpenoids and steroids) have been studied. These compounds show Cotton effect curves with peaks near 350mμ. Extremely weak UV absorption maxima in the 320- 350 mμ region can be detected for these ketones in iso-octane solution. This would indicate that the perturbing light wave
Organomanganese complexes of podocarpic acid derivatives
作者:Richard C. Cambie、Michael R. Metzler、Clifton E.F. Rickard、Peter S. Rutledge、Paul D. Woodgate
DOI:10.1016/0022-328x(92)80023-q
日期:1992.2
Cyclomanganation reactions of podocarpicacidderivatives containing aldehyde, ketone, ester, or oxime groups as directing functionalities have been investigated. Attempted complexation of amide-containing ligands proved generally to be unsuccessful whereas benzylic ketones gave their corresponding tetracarbonyl complexes in high yields. Complexation of ligands containing either two potential sites
Reactions with alkenes of η2-7-oxotetracarbonylmanganese complexes derived from diterpenoids
作者:Richard C. Cambie、Michael R. Metzler、Peter S. Rutledge、Paul D. Woodgate
DOI:10.1016/0022-328x(92)83318-c
日期:1992.5
A number of activated 7-oxotetracarbonylmanganese(I) complexes derived from podocarpic acid (1) and from dehydroabietic acid have been coupled with alkenes to give C(14) functionalised derivatives in high yields. Some coupling reactions resulted in cyclization to C(7), forming 4H-acephenanthrylene derivatives in moderate yields. Several modes of activating these manganese complexes towards coupling reactions were investigated; these included oxidative decarbonylation at room temperature, thermal promotion, and palladium-mediation.