An enantiospecific synthesis of (+)-methyl epijasmonate and (−)-methyl cucurbate from L-glutamic acid
作者:Tarun K. Sarkar、Bireswar Mukherjee、Sunil K. Ghosh
DOI:10.1016/s0040-4020(98)00069-6
日期:1998.3
An enantiospecific route to jasmonoid natural products, (+) - methyl epijasmonate and (−)-methyl cucurbate from L-glutamic acid is reported. The key step is a 5-(3,4) ene cyclization of a functionalized 1,6-diene as chiron, which sets up three chiral centres with a high degree of diastereoselectivity.
Cyclopentanoid allysilanes in synthesis: Generation via intramolecular ene reaction of activated 1,6-dienes and application to the synthesis of functionalized diquinanes
A new general route to -1,2-disubstituted cyclopentanoid allylsilanes useful in di-and triquinane synthesis is described based on intramolecular enereaction of activated 1,6-dienes featuring a homoallylsilane unit as the ene donor.
A new general route to cis-1,2-disubstituted cyclopentanoid allylsilanes is described based on intramolecular enereaction of activated 1,6-dienes featuring a homoallylsilane unit as the ene donor. In addition, application of these allylsilanes to the synthesis of some di- and triquinanes including the fungal metabolite (±)- hirsutene is presented.