Regio- and Stereoselective Diels–Alder Additions of Maleic Anhydride to Conjugated Triene Fatty Acid Methyl Esters
作者:Ursula Biermann、Werner Butte、Tarik Eren、Detlev Haase、Jürgen O. Metzger
DOI:10.1002/ejoc.200700243
日期:2007.8
The thermal, solvent-free addition of maleic anhydride to methyl calendulate (methyl 8,10-trans,12-cis-octadecatrienoate) (1a) occurs with very high regio- and stereoselectivity at C-8 and C-11 of the fatty compound giving the endo-Diels–Alder adduct 4 with retention of the cis-configured double bond. Analogously, the Diels–Alder addition of maleic anhydride to methyl α-eleostearate (methyl 9-cis,11