Cost-Effective Isolation of a Process Impurity of Pregabalin
AbstractCost-effective isolation methods were developed on preparative HPLC, flash LC, and simulated moving bed (SMB) to prepare the process impurity, 3-(aminomethyl)-5-methylhex-4-enoic acid (4-ene impurity), of pregabalin. By a thorough experimental study on the different isolation techniques available, it was concluded that SMB was the most cost-effective. Hence, it was a continuous chromatography that utilized the advantage of SMB so that a high quantity of the impurity was generated in a short period of time. SMB was equipped with eight reversed-phased columns and was used to separate the process impurity of pregabalin. The effects of flow rate in zone 2 (Q2) and 3 (Q3), as well as switching time, on the operating performance parameters like purity, productivity, and desorbent consumption were studied. Operating conditions leading to more than 90% purity in the raffinate outlet stream were identified, together with those achieving optimal performance. All of these developed methods are novel, cost-effective, and can be applied to the isolation of other process- and stability-related impurities of pregabalin.
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PRAKASH, L.; HIMAJA, M.; RAMAKRISHNA YADAV, B.; MAHESHWARA REDDY, A. Cost-Effective Isolation of a Process Impurity of Pregabalin. Sci. Pharm. 2015, 83, 453-463.
PRAKASH L, HIMAJA M, RAMAKRISHNA YADAV B, MAHESHWARA REDDY A. Cost-Effective Isolation of a Process Impurity of Pregabalin. Scientia Pharmaceutica. 2015; 83(3):453-463.Chicago/Turabian Style
PRAKASH, Lakkireddy; HIMAJA, Malipeddi; RAMAKRISHNA YADAV, Belly; MAHESHWARA REDDY, Arumalla. 2015. "Cost-Effective Isolation of a Process Impurity of Pregabalin." Sci. Pharm. 83, no. 3: 453-463.