Synthesis of oxygenated spongiane-type diterpenoids from carvone
作者:Antonio Abad、Consuelo Agulló、Ana C. Cuñat、Ana Belen Garcı́a
DOI:10.1016/s0040-4039(02)01891-9
日期:2002.10
diastereoselective approach to oxygenated spongiane diterpenes starting from (R)-(−)-carvone is described. The carvone is incorporated as the B ring in the final spongiane framework using a B→AB→ABC→ABCD approach, which involves an intramolecularDiels–Alder reaction and the regioselective ring-opening of a dihydrofuran ring as key synthetic steps. The structure of the key intermediate in this approach has been
Two regiospecific consecutive alkylations of carvone at C4 followed by acid-catalysed cyclisation afford bicyclic ketones which are potential intermediates for the synthesis of several classes of terpenes. Depending on the sequence of alkylation trans fused ketone or a mixture of and cis fused ketone may be prepared in only three steps, thus constituting a new type of annulation of carvone.
Synthesis of Terpenoid Unsaturated 1,4-Dialdehydes. π-Facial Selectivity in the Diels−Alder Reaction of the 1-Vinyl-2-methylcyclohexene Moiety of Polycyclic Systems with DMAD
作者:Antonio Abad、Consuelo Agulló、Lourdes Castelblanque、Ana C. Cuñat、Ismael Navarro、M. Carmen Ramírez de Arellano