Journals / Turkish Journal of Pharmaceutical Sciences / 2021 / Cilt: 18 - Sayı: 5

Stability-indicating LC Method for Quantification of Azelnidipine: Synthesis and Characterization of Oxidative Degradation Product

Azelnidipin Miktar Tayini İçin Stabilite Göstergeli LC Yöntemi: Oksidatif Bozunma Ürününün Sentezi ve Karakterizasyonu

Pages
33–38
Publication Date
2022-11-02
DOI
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

The evaluated validation parameters ascertained the practicality of the method for the quantification of azelnidipine tablets.

📌 3 Key Takeaways

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Objective & Hypothesis:Objectives: In the work presented here, the degradation behavior of azelnidipine under diverse forced degradation conditions was studied.
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Key Findings & Data:A stability-indicating liquid chromatographic method was established which could separate and resolve azelnidipine from its degradation products.
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Conclusion & Impact:The evaluated validation parameters ascertained the practicality of the method for the quantification of azelnidipine tablets.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objectives: In the work presented here, the degradation behavior of azelnidipine under diverse forced degradation conditions was studied. A stability-indicating liquid chromatographic method was established which could separate and resolve azelnidipine from its degradation products. Further, chemical kinetics under acidic and alkaline conditions were studied, and validation studies were performed. Materials and Methods: Using reversed-phase chromatography, azelnidipine and its formed degradants were resolved using phosphate buffer (pH 3.0) and methanol in a mixture of 10:90% v/v as a mobile phase at a flow rate of 1.0 mL/min. All eluents were detected at a wavelength of 256 nm. Results: Azelnidipine was degraded under acid, alkali, wet heat, and oxidized environment. The pH-dependent rate of hydrolysis of azelnidipine was studied under acidic and alkaline conditions and chemical kinetics were determined. Further, the oxidative degradation product of azelnidipine was synthesized and characterized as 3-(1-benzhydrylazetidin-3-yl) 5-isopropyl 2-amino-6-methyl-4-(3-nitrophenyl) pyridine-3,5-dicarboxylate (dehydro-AZD). Conclusion: The susceptibility of azelnidipine to hydrolysis was attributed to the presence of ester at 3 and 5 positions of 1,4 dihydropyridine. Further, under oxidative conditions, the aromatization of 1,4 dihydropyrinine resulted in dehydro-AZD. Azelnidipine followed the first-order reaction under acid and alkali hydrolysis, and was more susceptible to degradation under acidic conditions. The synthesized and confirmed dehydro-AZD was found as one of the metabolites and impurities of azelnidipine. The evaluated validation parameters ascertained the practicality of the method for the quantification of azelnidipine tablets.

Özet

Amaç: Bu çalışmada, azelnidipinin çeşitli zorlu bozunma koşulları altında bozunma davranışı incelenmiştir. Azelnidipinin stabilitesini gösteren, azelnidipini bozunma ürünlerinden ayırabilen ve çözebilen sıvı kromatografik yöntem geliştirilmiştir. Ayrıca asidik ve alkali koşullar altında kimyasal kinetikler incelendi ve doğrulama çalışmaları yapıldı. Gereç ve Yöntemler: Azelnidipin ve oluşan bozunma ürünleri, mobil faz olarak kullanılan fosfat tamponu (pH 3,0) ve metanol (%10:90 h/h) ile, 1,0 mL/dk akış hızında ters faz kromatografisi kullanılarak ayrıştırıldı. Tüm eluentler 256 nm dalga boyunda tespit edildi. Bulgular: Azelnidipin asit, alkali, ıslak ısı ve oksitlenmiş ortam koşullarında degrade edildi. Azelnidipinin pH’ye bağlı hidroliz hızı asidik ve alkali koşullar altında çalışılmış ve kimyasal kinetik belirlenmiştir. Ayrıca, azelnidipinin oksidatif bozunma ürünü olan 3-(1-benzhidrilazetidin-3-il) 5-izopropil 2-amino-6-metil-4-(3-nitrofenil) piridin-3,5-dikarboksilat (dehidro-AZD) sentezlendi ve karakterize edildi. Sonuç: Azelnidipinin hidrolize duyarlılığı, 1,4 dihidropiridinin 3 ve 5 pozisyonlarındaki esterin varlığı ile ilişkililendirildi. Ayrıca, oksidatif koşullar altında 1,4 dihidropirinin aromatizasyonu dehidro-AZD eldesi ile sonuçlandı. Azelnidipin için, asit ve alkali hidroliz altında bozunmasının birinci derece kinetiğe uyduğu belirlendi ve asidik koşullar altında bozunmaya daha duyarlıydı. Sentezlenen ve doğrulanan dehidro-AZD, azelnidipinin metabolitlerinden ve safsızlıklarından biri olarak bulundu. Değerlendirilen doğrulama parametreleri, azelnidipin tabletlerinin miktar tayini için yöntemin pratikliğini belirlemiştir.

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Cite This Article

SONAWANE, S. S., BANKAR, P. C., KSHIRSAGAR, S. J. (2022). Stability-indicating LC Method for Quantification of Azelnidipine: Synthesis and Characterization of Oxidative Degradation Product. Turkish Journal of Pharmaceutical Sciences, Cilt: 18 - Sayı: 5, 33–38. https://ajindex.com/articles/613631

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