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
在使用δ-内酰胺氨基甲酸酯制备AMPA型谷氨酸拮抗剂的同系物的另一种策略中,我们使用了焦谷氨酸酯的5-外亚甲基衍生物。以这种方式制备了同手性吡唑氨基酸衍生物18和19。尽管这种合成产生的产物具有甘氨酸残基与杂环被两个碳原子隔开,但是杂环的取代与由δ-内酰胺氨基甲酸酯制备的化合物中的取代不同。也已经以这种方式制备了支链化合物32和33,但是第二手性中心在合成过程中是差向异构的。还报道了一个有趣的反应,由亚氨基醚24生成吡啶酮27和乙酰乙酸叔丁酯。