Synthesis of (2S,2?R,3?R)-2-(1?-[3H],2?,3?-dicarboxylcyclopropyl)-glycine ([3H]-DCG-IV)
作者:J�rgen Wichmann、Philipp Huguenin、Geo Adam
DOI:10.1002/(sici)1099-1344(200001)43:1<1::aid-jlcr285>3.0.co;2-n
日期:2000.1
The conformationally restricted analog of L-glutamic acid (L-Glu, 1), (2S,2'R,3'R)-2-(2',3'-dicarboxylcyclopropyl)-glycine (DCG-IV, 2) is a potent group II mGluR agonist. In order to study the distribution of group IImGluRs in the brain and to establish a radioligand binding assay we have developed a synthesis of [H-3]-DCG-IV (2a). The key intermediate, alpha-bromo aldehyde 7, was prepared in four steps starting from (-)-Feist's acid (3). The incorporation of tritium was performed by reaction of 7 with tri-n-butyltin tritide to give 8, which was transformed in two steps into 2a.