Cascade radical processes leading to polycycle constructions. The total synthesis of spongian-16-one
作者:Gerald Pattenden、Lee Roberts
DOI:10.1016/0040-4039(96)00740-x
日期:1996.6
A concise total synthesis of the marine sponge metabolite spongian-16-one 1, which features a novel cascade of three consecutive 6-endo-trig radical cyclisations from a polyene acyl radical intermediate as a key step, viz9 → 10, is described.
Cascade radical cyclisations leading to polycyclic diterpenes. Total synthesis of (±)-spongian-16-one
作者:Gerald Pattenden、Lee Roberts、Alexander J. Blake
DOI:10.1039/a708042e
日期:——
A cascade of three consecutive 6-endo-trig radical cyclisations from the polyene acyl radical intermediate 12 derived from the selenoate 11 is used to construct the trans,anti,trans,anti,cis-tetracyclic keto lactone 20 in one step. Manipulation of the ketone function in 20 to the corresponding gem-dimethyl substituted carbon then completed a concise synthesis of the marine metabolite spongian-16-one 1.