RETRACTED: Amino acid based Rosuvastatin cocrystals: Towards the improvement of physicochemical parameters

Abstract

• Cocrystal construction between rosuvastatin calcium and amino acids. • Structural and In vitro characterization of cocrystals. • Establishment of intermolecular interaction within the cocrystals. • Cocrystals are found to exhibit higher solubility and dissolution rate. The poor physicochemical properties like low solubility and low dissolution rate of rosuvastatin calcium remain as an obstruction for formulation development. In the present investigation, we explore the evolution of rosuvastatin cocrystal, which may offer the synergetic physico-chemical properties of the drug. Cocrystal crafting depends on two possible intermolecular interactions, heteromeric and the homomeric selection of compounds with complementary functional groups are contemplated as a possible cause of supramolecular synthons in cocrystal formation. Specifically, cocrystals of rosuvastatin with L-asparagine and L-glutamine with molar ratio (1:1) were fabricated by using slow solvent evaporation and solvent evaporation techniques. Novel cocrystals of rosuvastatin-asparagine (RSC-C) and rosuvastatin-glutamine (RSC-G) cocrystals obtained by slow solvent evaporation were utilized for preliminary investigation and further scale-up was done by using the solvent evaporation technique. The novel cocrystals showed a new characteristic of powder X-ray diffraction, thermograms of differential scanning calorimetry, 1 H liquid FT-NMR spectra, and scanning electron microscopy. These results signify, the establishment of intermolecular interaction within the cocrystals. In both the novel cocrystals, rosuvastatin was determined to be engaged in the hydrogen bond interaction with the complementary functional groups of L-asparagine and L-glutamine. Compared with the pure rosuvastatin, RSC-C and RSC-G cocrystal showed 2.17-fold and 1.60-fold improved solubility respectively. The dissolution test showed that the RSC-C and RSC-G cocrystal exhibited 1.64-fold and 1.45-fold higher dissolution rate than the pure rosuvastatin in pH6.8 phosphate buffer respectively. Modulation in the chemical environment, improvement in the solubility and dissolution rate demonstrated the benefit of co-crystallization to improve the physicochemical properties of the drug.