In this communication, we report the synthesis of ~5 mCi of [3-14C]solanesol (1) prepared from ethyl [3-14C]acetoacetate and (all-E)-octaprenyl bromide (2) in four steps, with a specific radioactivity of 19.83 mCi/mmol and with a chemical/stereochemical and radiochemical purity of ≥ 95%. (Figure 1). Position 3 of the chain was selected for 14C labelling because of the metabolic stability of this position. Unlabelled (all-E)-octaprenyl (18) (Scheme 4) necessary for this work was prepared via a convergent iterative ‘allyl-allyl’ coupling approach of precursors easily derived from readily available inexpensive starting materials.1 Copyright © 2013 John Wiley & Sons, Ltd.
在这项通讯中,我们报告了合成约5 mCi的[3-14C]solanesol(1),其是通过四个步骤由乙基[3-14C]
乙酰乙酸酯和(全-E)-八烯基
溴化物(2)制备而成,特定放射性为19.83 mCi/mmol,
化学/立体
化学和放射
化学纯度≥95%(见图1)。链的3位被选择为14C标记位点,因为该位置具有代谢稳定性。此次研究所需的未标记(全-E)-八烯基(18)(见方案4)是通过一种收敛的迭代“烯丙基-烯丙基”偶联方法,从易于获得的廉价起始材料派生的前体合成的。1 版权所有 © 2013 John Wiley & Sons, Ltd.