cas 80214-83-1, Roxithromycin | Articles data ｜lookchem

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80214-83-1

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A process for the purification of roxithromycin
A process for the purification of roxithromycin with high level of impurity -H comprising subjecting the impure roxithromycin to at least partial dissolution and/or suspension in solvent selected from ethanol, acetonitirle, aromatic solvents and mixture of ethanol and acetonitrile; followed by crystallizing to thereby obtain roxithromycin with desired level of impurity-H of less than 0.5%. The invention also relates to crystalline polymorphic forms B and C of roxithromycin obtained following the above process of purification and having impurity-H of less than 0.5%.
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Page 5

(2008/06/13)

Process for preparing erythromycin derivative, such as roxithromycin, from the corresponding oxime
A process for preparing an erythromycin derivative, such as roxithromycin, from the corresponding oxime is disclosed. The oxime is reacted with a metal alkoxide and results in improvements over prior art processes involving the oxime. Roxithromycin is a known anti-bacterial agent.
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(2008/06/13)

Process for preparing roxithromycin and derivatives thereof
A process for preparing an erythromycin derivative of formula (1), such as roxithromycin, from the corresponding oxime is discloded. The oxime is reacted with a metal alkoxide and results in improvements over prior art processes involving the oxime. Roxithromycin is a known anti-bacterial agent.
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(2008/06/13)

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Chemical Properties

Appearance/Colour :white crystalline powder
Melting Point: 111-118 °C
Boiling Point: 864.7 °C at 760 mmHg
Flash Point:476.7 °C
Density: 1.25 g/cm³
Solubility:chloroform: soluble10mg/mL
Storage Temp.:2-8°C
Vapor Pressure: 7.17E-35mmHg at 25°C
Refractive Index: 1.535
PKA: pKa 9.27±0.01(H2O t = 25.0 I = 0.15 (KCl)) (Uncertain)
Merck: 14,8276
PSA: 216.89000
LogP: 2.20960

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