An alternative to the use of δ-lactam urethanes in the “ring switch” approach to higher homologues of AMPA-type glutamate antagonists
作者:Peter B. Hitchcock、Shazia Rahman (née Masood)、Douglas W. Young
DOI:10.1039/b304609p
日期:——
the preparation of homologues of AMPA-type glutamate antagonists, we have used 5-exomethylene derivatives of pyroglutamate esters. The homochiral pyrazole amino acid derivatives 18 and 19 have been prepared in this way. Although this synthesis yields products with a glycine residue separated from a heterocyclic ring by two carbon atoms, the substitution of the heterocyclic ring is different from that