(Z)- and
(E)-4-Amino-3-(4-chlorophenyl)but-2-enoic acids have been synthesized from
4-chloroacetophenone as conformationally restricted analogues of baclofen. The
corresponding unsaturated lactam (4) has been catalytically reduced and
hydrolysed to baclofen to demonstrate the suitability of (4) as a precursor for
radiolabelled baclofen of high specific activity.
(Z)-和
(Z)-和(E)-4-氨基-3-(4-氯苯基)丁-2-烯酸是由
作为巴氯芬的构象受限类似物。相应的
相应的不饱和内酰胺(4)被催化还原并水解为巴氯芬。
相应的不饱和内酰胺(4)经催化还原并水解为巴氯芬,从而证明了(4)作为放射性标记巴氯芬的前体的适用性。
放射性标记的高特异性巴氯芬的前体。