Carbon-14 labeled (R)-3-fluoro-4-(2′-(5′′, 6′′, 7′′, 8′′-tetrahydro-5′′, 5′′, 8′′, 8′′-tetramethyl-2′′-naphthyl)-[2′-hydroxy-14C])[carbonyl-14C]acetamidobenzoic acid, 1, was prepared in a six step radioactive synthesis from diethyl [carboxylate-14C1,2] oxalate. The penultimate compound was purified by chiral HPLC, which following deprotection yielded 1 in an overall radiochemical yield of 6.8%. The specific activity of the final product was found to be 24.5 µCi/mg with a radiochemical purity of > 99% as determined by HPLC. Derivatization of 1 via trimethylsilyl diazomethane to the corresponding methyl ester 9, followed by chiral HPLC analysis, demonstrated that 1 had an optical purity of > 99% ee. Copyright © 2002 John Wiley & Sons, Ltd.
碳-14标记的(R)-3-
氟-4-(2′-(5′′, 6′′, 7′′, 8′′-四
氢-5′′, 5′′, 8′′、8′-四
甲基-2′′-
萘基)-[2′-羟基-14C])[羰基-14C]乙
酰胺基
苯甲酸,1,是由[羧基-14C1,2]
草酸二乙酯经六步放射性合成制备的。倒数第二个化合物经手性高效
液相色谱法纯化,经
脱保护后得到 1,总放射性
化学收率为 6.8%。经 HPLC 测定,最终产物的比活度为 24.5 µCi/mg,放射
化学纯度大于 99%。通过三
甲基硅基
重氮甲烷将 1 衍生为相应的甲
酯 9,然后进行手性 HPLC 分析,结果表明 1 的光学纯度大于 99% ee。Copyright © 2002 John Wiley & Sons, Ltd. All Rights Reserved.