Multiple labeling of a potent CX<sub>3</sub>CR1 antagonist for the treatment of multiple sclerosis
作者:Jonas Malmquist、Peter Ström
DOI:10.1002/jlcr.2958
日期:2012.8
Several methods for the preparation of five isotopologues of the CX3CR1 antagonist 1 were developed. Volatile and radioactive 1-chloro- and 1-bromo-ethyl-benzene was handled in [2′-14C] and [3′, 5′-3H] labeling of 1. d-Leucinol ((R)-2-amino-4-methylpentan-1-ol) was labeled as [1-14C] and [4-14C] via a Wittig reaction using Garner's aldehyde and a Strecker amino acid synthesis with d-acylase resolvation, respectively. A [2H10]d-leucinol was used for the stable labeled [M + 10] isotopologue. The products were isolated with 97.6–100% stereo chemical and radiochemical purity as for specific activity 768 GBq/mmol and 1.6–2.0 GBq/mmol, respectively.
开发了几种制备 CX3CR1 拮抗剂 1 的五种同位素异体物的方法。挥发性和放射性 1-氯- 和 1-溴-乙基-苯在 1. d-亮氨醇 ((R)-2-amino- 4-甲基戊-1-醇)分别通过使用 Garner 醛的 Wittig 反应和使用 d-酰基酶拆分的 Strecker 氨基酸合成标记为 [1-14C] 和 [4-14C]。 [2H10]d-亮氨醇用于稳定标记的[M + 10]同位素体。分离出的产物的立体化学纯度和放射化学纯度分别为 97.6–100%,比活度分别为 768 GBq/mmol 和 1.6–2.0 GBq/mmol。