A biogenetically patterned first total synthesis of (±)-6-epijunicedranol (or junicedran-11-ol)
作者:A Srikrishna、P.Praveen Kumar
DOI:10.1016/s0040-4039(97)00216-5
日期:1997.3
The first total synthesis of (±)-6-epijunicedranol (4), employing a biogeneticallypatterned carbonium ion mediated cyclisation and rearrangement of an enone for the efficient generation of four contiguous quaternary carbon atoms, is described.
Rearrangement approaches to sesquiterpenes containing multiple contiguous quaternary carbon atoms. Total synthesis of (±)-myltayl-8(12)-ene and (±)-6-epijunicedranol
作者:A. Srikrishna、C. V. Yelamaggad、P. Praveen Kumar
DOI:10.1039/a906706j
日期:——
Boron trifluoride–diethyl ether mediated cyclization and rearrangement transformed the dienones 12 and 18 into the tricyclic ketones 16 and 17, efficiently creating three and four contiguous quaternarycarbonatoms, respectively. Wittig methylenation of 16 furnished (±)-myltayl-8(12)-ene (11), whereas reduction of the ketone 17 furnished (±)-6-epijunicedranol (23).