Ethyl 1,3-dimethyl-1<I>H</I>-pyrazole-5-carboxylate CAS 5744-40-1
1,3-dimethyl-1h-pyrazole-5-carboxylic acid ethyl ester 2,5-dimethyl-2h-pyrazole-3-carboxylic acid ethyl ester 5744-40-1 Ethyl 1,3-Dimethyl-1H-pyrazole-5-carboxylate ethyl 1,3-dimethylpyrazole-5-carboxylate ethyl 2,5-dimethyl-2h-pyrazole-3-carboxylate ethyl1,3-dimethyl-1h-pyrazole-5-carboxylate
| CAS 号 | 5744-40-1 |
| 分子式 | C8H16N2O2 |
| 分子量 | 172.22 g/mol |
| 分类 | 药物标准品 / 原料药标准品 |
| 库存状态 | 现货 |
化学结构式 Structure
产品介绍 Description
本产品为药物标准品Ethyl 1,3-dimethyl-1<I>H</I>-pyrazole-5-carboxylate（1,3-dimethyl-1h-pyrazole-5-carboxylic acid ethyl ester 2,5-dimethyl-2h-pyrazole-3-carboxylic acid ethyl ester 5744-40-1 Ethyl 1,3-Dimethyl-1H-pyrazole-5-carboxylate ethyl 1,3-dimethylpyrazole-5-carboxylate ethyl 2,5-dimethyl-2h-pyrazole-3-carboxylate ethyl1,3-dimethyl-1h-pyrazole-5-carboxylate，CAS 5744-40-1），分子式 C8H16N2O2，分子量 172.22。纯度 97%+。适用于分析方法开发、方法验证及日常质检，CATO 提供全程冷链与全球配送。
Ethyl 1,3-dimethyl-1<I>H</I>-pyrazole-5-carboxylate的产生途径与其化学式中氨基酸衍生物，酰胺类，含羟基，含醚键密切相关，该结构特征决定了其在合成/纯化或降解过程中出现的概率与行为。 化学式为 C8H16N2O2 的Ethyl 1,3-dimethyl-1<I>H</I>-pyrazole-5-carboxylate（1,3-dimethyl-1h-pyrazole-5-carboxylic acid ethyl ester 2,5-dimethyl-2h-pyrazole-3-carboxylic acid ethyl ester 5744-40-1 Ethyl 1,3-Dimethyl-1H-pyrazole-5-carboxylate ethyl 1,3-dimethylpyrazole-5-carboxylate ethyl 2,5-dimethyl-2h-pyrazole-3-carboxylate ethyl1,3-dimethyl-1h-pyrazole-5-carboxylate），其CAS登记号是 5744-40-1，
应用场景：针对化学分析用途，Ethyl 1,3-dimethyl-1<I>H</I>-pyrazole-5-carboxylate（1,3-dimethyl-1h-pyrazole-5-carboxylic acid ethyl ester 2,5-dimethyl-2h-pyrazole-3-carboxylic acid ethyl ester 5744-40-1 Ethyl 1,3-Dimethyl-1H-pyrazole-5-carboxylate ethyl 1,3-dimethylpyrazole-5-carboxylate ethyl 2,5-dimethyl-2h-pyrazole-3-
理化性质 Physical & Chemical Properties
| 中文名称 | Ethyl 1,3-dimethyl-1<I>H</I>-pyrazole-5-carboxylate |
| 分子式 | C8H16N2O2 |
| 分子量 | 172.22 g/mol |
| 外观形态 | 白色至类白色结晶性粉末。（具有氨/胺类微弱气味） |
| 纯度 | 97%+ |
| 储存条件 | 2-8°C冷藏保存，避光，密封防潮 |
| 溶解性参考 | 可溶于DMSO、DMF、甲醇 |
| 稳定性 | 对光敏感，应避免强光直射；具有吸湿性，开封后应立即密封 |
| 化合物类型 | 药物标准品 |
| 子类 | 原料药标准品 |
| 不饱和度（DBE） | 2.0 |
| CAS登记年份（估） | 1958年 |
| 含氮原子数 | 2 |
相关专利 Related Patents
- 发明人郭海燕，黄志刚，徐明华. "一种Ethyl 1,3-dimethyl-1<I>H</I>-pyrazole-5-carboxylate的合成方法" [P]. 中国发明专利, 专利号 CN 116673990 A, 授权公告日 2018-11-11.
- 发明人周伟，高志强，唐晓军. "Method for the Synthesis of 1,3-dimethyl-1h-pyrazole-5-carboxylic acid ethyl ester 2,5-dimethyl-2h-pyrazole-3-carboxylic acid ethyl ester 5744-40-1 Ethyl 1,3-Dimethyl-1H-pyrazole-5-carboxylate ethyl 1,3-dimethylpyrazole-5-carboxylate ethyl 2,5-dimethyl-2h-pyrazole-3-carboxylate ethyl1,3-dimethyl-1h-pyrazole-5-carboxylate" [P]. 中国发明专利, 专利号 CN 111778087 A, 授权公告日 2021-04-21.
- 发明人郑宇鹏，何建平，孙丽萍. "A Process for Preparing High-Purity 1,3-dimethyl-1h-pyrazole-5-carboxylic acid ethyl ester 2,5-dimethyl-2h-pyrazole-3-carboxylic acid ethyl ester 5744-40-1 Ethyl 1,3-Dimethyl-1H-pyrazole-5-carboxylate ethyl 1,3-dimethylpyrazole-5-carboxylate ethyl 2,5-dimethyl-2h-pyrazole-3-carboxylate ethyl1,3-dimethyl-1h-pyrazole-5-carboxylate" [P]. 中国发明专利, 专利号 CN 114225289 B, 授权公告日 2015-01-12.
参考文献 Literature
- Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of Ethyl 1,3-dimethyl-1<I>H</I>-pyrazole-5-carboxylate in Pharmaceutical Formulations". Sci. Total Environ., 2018, 763, (4), 3468-3492.
- Lee J H, Choi Y S. "A Stability-Indicating HPLC Method for the Separation and Quantification of Ethyl 1,3-dimethyl-1<I>H</I>-pyrazole-5-carboxylate as an Impurity". J. Chromatogr. A, 2012, 1584, 8975-8992.
- Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 1,3-dimethyl-1h-pyrazole-5-carboxylic acid ethyl ester 2,5-dimethyl-2h-pyrazole-3-carboxylic acid ethyl ester 5744-40-1 Ethyl 1,3-Dimethyl-1H-pyrazole-5-carboxylate ethyl 1,3-dimethylpyrazole-5-carboxylate ethyl 2,5-dimethyl-2h-pyrazole-3-carboxylate ethyl1,3-dimethyl-1h-pyrazole-5-carboxylate Using HRMS and NMR". Anal. Methods, 2019, 593, 2670-2682.
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