Two-step regio- and stereoselective syntheses of [19F]- and [18F]-2-deoxy-2-(R)-fluoro-β-d-allose
作者:Rezwan Ashique、Raman V. Chirakal、Donald W. Hughes、Gary J. Schrobilgen
DOI:10.1016/j.carres.2005.12.002
日期:2006.3
Replacement of specific hydroxyl groups by fluorine in carbohydrates is an ongoing challenge from chemical, biological, and pharmaceutical points of view. A rapid and efficient two-step, regio- and stereoselective synthesis of 2-deoxy-2-(R)-fluoro-beta-d-allose (2-(R)-fluoro-2-deoxy-beta-d-allose; 2-FDbetaA), a fluorinated analogue of the rare sugar, d-allose, is described. TAG (3,4,6-tri-O-acetyl-1
从化学,生物学和药学的观点来看,碳水化合物中的氟取代特定的羟基是一个持续的挑战。快速,有效的两步,区域和立体选择性合成2-deoxy-2-(R)-氟-β-d-阿洛糖(2-(R)-氟-2-脱氧-β-d-阿洛糖;描述了2-FDbetaA),一种稀有糖的氟化类似物d-阿洛糖。TAG(3,4,6-三-O-乙酰基-1,5-脱水-2-脱氧-d-阿拉伯糖基己糖-1-烯醇或3,4,6-三-O-乙酰基-d-葡萄糖醛)将其在Ne / He混合物中与稀F(2)或与CH(3)COOF在-60°C下于无水HF中氟化。将氟化的中间体在1N HCl中水解,并将水解产物通过液相色谱法纯化并进行表征1D(1)H,(13)C和(19)F NMR光谱以及2D NMR光谱和质谱分析。此外,首次合成(18)F标记的2-deoxy-2-(R)-氟-β-d-阿洛糖(2-[((18)F] FDbetaA),经衰变校正后的总放射化学产率为相对于[(18)F]