Synthesis and biological evaluation of 6-carboxy-3,4-methanoprolines, new rigid glutamate analogs
6-Carboxy-3,4-methanoprolines were prepared by reacting ethyl diazoacetate with the suitable 3,4-didehydroproline derivative in the presence of rhodium(II)acetate dimer as catalyst. The affinities of the title compounds for displacement of receptor binding to ionotropic and metabotropic (mGluR1α) glutamate receptors were also determined.