(R)-3 (NPS 2143) is a negative allosteric modulator of the human calcium-sensing receptor (CaSR) and as such represents an important pharmacological tool compound for studying the CaSR. Herein, we disclose for the first time a complete experimental description, detailed characterisation and assessment of enantiomeric purity for (R)-3. An efficient, reproducible and scalable synthesis of (R)-3 that requires a minimum of chromatographic purification steps is presented. (R)-3 was obtained in excellent optical purity (er > 99:1) as demonstrated by chiral HPLC and the pharmacological profile for (R)-3 is in full accordance with that reported in the literature.
(R)-3(NPS 2143)是人类钙感受受体(CaSR)的负向变构调节剂,因此代表了一个重要的药理学工具化合物,用于研究CaSR。在此,我们首次披露了对(R)-3的完整实验描述,详细表征和对对映体纯度的评估。我们提出了一种高效、可重复和可扩展的(R)-3合成方法,只需要最少的色谱纯化步骤。通过手性HPLC表明(R)-3的光学纯度非常高(er > 99:1),而且(R)-3的药理学特性完全符合文献报道。