A sequential RCM/fragmentation protocol towards chiral, stereodefined medium ring sesquiterpenoids. A carvone route to E- and Z-germacrenes
摘要:
A short, flexible and enantioselective approach towards 10-membered germacratrienones, from the commercially available monoterpene chiron (-)-carvone, involving RCM and Grob-type fragmentation as the pivotal steps is delineated. (c) 2005 Elsevier Ltd. All rights reserved.
A general, ring closure metathesis based enantiospecific approach to polyfunctional eudesmane, eremophilane and agarofuran sesquiterpenoids
作者:Goverdhan Mehta、R.Senthil Kumaran
DOI:10.1016/s0040-4039(03)01757-x
日期:2003.9
An enantiospecific and stereo- and functional group diversity oriented approach to eudesmane, eremophilane and agarofuran sesquiterpenoids from (-)-carvone has been devised. RCM has been employed as the key reaction to generate the highly functionalized eudesmane framework. Further elaboration of the eudesmane framework to agarofurans and biogenetic-type rearrangement to eremophilanes is Outlined. (C) 2003 Elsevier Ltd. All rights reserved.