Synthesis of carbon-14, carbon-13 and deuterium labeled forms of thioacetamide and thioacetamide S-oxide
作者:Diganta Sarma、Robert P. Hanzlik
DOI:10.1002/jlcr.1933
日期:2011.11
Thioacetamide (TA) is a model hepatotoxin that undergoes metabolic activation via two successive S-oxidations. The ultimate toxic metabolite thioacetamide S,S-dioxide, or its tautomer acetimidoyl sulfinic acid CH3C(NH)SO2H, then acylates lysine side chains on cellular proteins leading to cellular dysfunction or death. To identify individual target proteins, quantitate the extent of their modification and elucidate the structural details of their modification, we required both radio-labeled and stable-labeled forms of TA and its intermediate metabolite thioacetamide S-oxide (TASO). The latter is stable when purified but can be difficult to isolate. Considering currently available isotopic precursors, we devised and report here methods for the synthesis and isolation of TA and TASO labeled with C-14, C-13, and/or deuterium. The methods are straightforward, utilize readily available precursors, and are amenable to small scale. Copyright © 2011 John Wiley & Sons, Ltd.
硫代乙酰胺(TA)是一种通过连续两次硫氧化进行代谢活化的肝毒素模型。其最终毒性代谢物硫代乙酰胺S,S-二氧化物,或其互变异构体乙亚氨磺酸CH3C(NH)SO2H,随后使细胞蛋白质上的赖氨酸侧链酰化,导致细胞功能障碍或死亡。为了鉴定单个靶蛋白,量化其修饰程度,并阐明其修饰的结构细节,我们需要放射性标记和稳定标记形式的TA及其中间代谢物硫代乙酰胺S-氧化物(TASO)。后者在纯化时是稳定的,但难以分离。考虑到目前可用的同位素前体,我们设计并在此报道了用C-14、C-13和/或氘标记的TA和TASO的合成和分离方法。这些方法简单直接,使用易于获得的前体,并适用于小规模。版权所有 © 2011 John Wiley & Sons, Ltd。