A short synthesis of 4-methylene glutamic acid was achieved. Under the
rmal conditions the corresponding anhydride reacted with 2,3 dimethylb
utadiene to afford the corresponding DIELS-ALDER adduct in good yield.
L-4-methylene glutamic acid essentially acts on glutamate metabotropi
c receptors and is as potent as L-Glu in producing IPs.