Synthesis of [11C]MK-1064 as a new PET radioligand for imaging of orexin-2 receptor
作者:Mingzhang Gao、Min Wang、Qi-Huang Zheng
DOI:10.1016/j.bmcl.2016.05.083
日期:2016.8
reference standard MK-1064 5″-chloro-N-((5,6-dimethoxypyridin-2-yl)methyl)-[2,2′:5′,3″-terpyridine]-3′-carboxamide} was synthesized from methyl 2-chloro-5-iodonicotinate and 5-(chloropyridin-3-yl)boronic acid in 4 steps with 33% overall chemical yield. The precursor desmethyl-MK-1064 5″-chloro-N-((5-hydroxy-6-methoxypyridin-2-yl)methyl)-[2,2′:5′,3″-terpyridine]-3′-carboxamide} for radiolabeling was synthesized
参考标准MK-1064 5″-氯-N -((5,6-二甲氧基吡啶-2-基)甲基)-[2,2':5',3''-吡啶] -3'-甲酰胺}为由2-氯-5-碘代烟酸甲酯和5-(氯吡啶-3-基)硼酸分4步合成,总化学收率为33%。前体去甲基-MK-1064 5″-氯-N -((5-羟基-6-甲氧基吡啶-2-基)甲基)-[2,2':5',3''-吡啶] -3'-由2-溴吡啶-3-醇和5”-氯-[2,2':5',3”-三联吡啶] -3'-羧酸经6步合成放射性标记的羧酰胺},总化学收率为17%。目标示踪物[ 11 C] MK-1064 5″-氯-N -((5- [ 11 C]甲氧基-6-甲氧基吡啶-2-基)甲基)-[2,2':5',3“ -叔吡啶] -3′-羧酰胺}由O制备在碱性条件下用[ 11 C] CH 3 OTf对相应的前体去甲基-MK-1064进行-[ 11 C]甲基化,并通过简化固相萃取(