Radiosynthesis of 1′-[18F]fluoroethyl-β-D-lactose ([18F]-FEL) for early detection of pancreatic carcinomas with PET
作者:Nashaat Turkman、Ashutosh Pal、William P. Tong、Juri G. Gelovani、Mian M. Alauddin
DOI:10.1002/jlcr.1855
日期:2011.5.15
and produces overall low yields. Here, we report on synthesis and radiolabeling of another analog of lactose, the 1′-[18F]fluoroethyl-β-D-lactose for PET imaging of pancreatic carcinomas. Methods: Two precursor compounds, 1′-bromoethyl-2′,3′,6′,2,3,4,6-hepta-O-acetyl-β-D-lactose 4, and 1′-p-toluenesulfonylethyl-2′,3′,6′,2,3,4,6-hepta-O-acetyl-β-D-lactose 5, were synthesized in two and three steps, respectively;
简介:肝细胞癌-肠-胰腺和胰腺炎相关蛋白,也称为乳糖结合蛋白,在肿瘤周围胰腺组织中上调。以前,我们报道了乙基-β-D-吡喃半乳糖基-(1,4')-2'-脱氧-2'-[18F]氟-β-D-吡喃葡萄糖苷(Et-[18F]-FDL),一种放射性氟化乳糖用于小鼠小胰腺癌正电子发射断层扫描 (PET) 的类似物。然而,Et-[18F]-FDL 前体的合成涉及 11 个步骤,非常冗长,并且总体收率较低。在这里,我们报告了另一种乳糖类似物的合成和放射性标记,即用于胰腺癌 PET 成像的 1'-[18F] 氟乙基-β-D-乳糖。方法:两种前体化合物,1'-溴乙基-2',3',6',2,3,4,6-七-O-乙酰基-β-D-乳糖4和1'-对甲苯磺酰基乙基-2 ',3',6',2,3,4, 6-hepta-O-acetyl-β-D-lactose 5,分别分两步和三步合成;然后,对这些前体进行冷氟化和放射性氟化。将反应混合物通过硅胶