A new high-yield synthetic route to PET CB1 radioligands [11C]OMAR and its analogs
作者:Mingzhang Gao、Min Wang、Qi-Huang Zheng
DOI:10.1016/j.bmcl.2012.04.030
日期:2012.6
OMAR analogs reference standards and their corresponding desmethylated precursors were synthesized from substituted anilines either in 4 and 5 steps with 27–32% and 24–31% yield, or in 3 and 4 steps with 21–30% and 19–28% yield, respectively. [11C]OMAR and its analog radioligands were prepared from their desmethylated precursors with [11C]CH3OTf through O-[11C]methylation and isolated by HPLC combined
OMAR类似物参考标准品及其相应的去甲基化前体是由取代的苯胺分4步和5步合成的,产率为27–32%和24–31%,或分3步和4步合成的,产率为21–30%和19–28%,分别。[ 11 C] OMAR及其类似物放射性配体由具有[ 11 C] CH 3 OTf的脱甲基前体通过O- [ 11 C]甲基化制备,并通过HPLC结合固相萃取(SPE)在50-65%的放射化学中进行分离产生基于[ 11 C] CO 2的化合物,并将其衰减校正为轰击结束(EOB),在EOB处的比活为370–740 GBq /μmol。