2005
DOI: 10.1039/b501304f
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Crystal engineering of pharmaceutical co-crystals from polymorphic active pharmaceutical ingredients

Abstract: The carboxylic acid-primary amide supramolecular heterosynthon is exploited for the generation of pharmaceutical co-crystals that contain two active pharmaceutical ingredients that are polymorphic in their pure forms.

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Cited by 224 publications
(166 citation statements)
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“…In the salt anhydrate, the hydroxyl group bonded to the methylene sp 3 -hybridized 5 0 -carbon adopts an equatorial position on the same side of the sulfur atom of the five-membered oxathiolane ring. In contrast, the 5 0 -hydroxyl group is axially bonded to carbon on the same side of cytosine in 2, in an equivalent position of one of the two 5 0 -methylene hydrogens of 1 (Fig.…”
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confidence: 99%
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“…In the salt anhydrate, the hydroxyl group bonded to the methylene sp 3 -hybridized 5 0 -carbon adopts an equatorial position on the same side of the sulfur atom of the five-membered oxathiolane ring. In contrast, the 5 0 -hydroxyl group is axially bonded to carbon on the same side of cytosine in 2, in an equivalent position of one of the two 5 0 -methylene hydrogens of 1 (Fig.…”
mentioning
confidence: 99%
“…To improve APIs solubility, engineering and screening of salts, cocrystals, solvates, hydrates and polymorphs are commonly invoked. 3,4 In this sense, salt preparation of crystalline solids is one of the most attractive alternatives because of higher functional and technical characteristics of salts, such as solubility, stability and manufacturability, beyond low costs and practical procedures of preparation, high yield, reproducibility and purity. 5,6 Furthermore, the engineering, prediction and understanding of salt formation are based on elegant chemical approaches on assembly mechanisms driven by molecular recognition events, which contribute to an easier legal process for protection of intellectual property on novel API crystal phases due to nonobviousness of designed molecular salts.…”
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confidence: 99%
“…Contudo, adotar-se-ão as seguintes definições: [3][4][5] Complexos moleculares: quando a molécula agregada a um API é utilizada com o intuito de promover a interação entre as demais moléculas de API no cristal.…”
Section: Formas Cristalinas De Compostos Farmacêuticosunclassified
“…5 Isto pode ser verificado pelo considerável aumento de publicações e depósitos de estruturas cristalinas no CSD. 16 Diferentemente dos polimorfos, os cocristais consistem de um cristal formado por dois ou mais componentes que são sólidos à temperatura ambiente e em suas formas puras, coexistindo numa razão estequiométrica entre um ou mais APIs moleculares ou iônicos e um ou mais agentes cocristalizantes.…”
Section: Cocristaisunclassified
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