fulltext.study @t Gmail

A study of photodegradation of drug rosuvastatin calcium in solid state and solution under UV and visible light irradiation: The influence of certain dyes as efficient stabilizers

Paper ID Volume ID Publish Year Pages File Format Full-Text
26646 43969 2013 9 PDF Available
Title
A study of photodegradation of drug rosuvastatin calcium in solid state and solution under UV and visible light irradiation: The influence of certain dyes as efficient stabilizers
Abstract

Photodegradation of rosuvastatin calcium (1) under several radiation wavelengths in solid state and solution in solvents of different polarity has been studied. It was shown that 1 is very sensitive, especially in solution, even to low energy wavelengths and main and almost exclusive degradation pathway includes formation of diastereomeric dihydrophenanthrene derivatives (R,S,R)-2 and (S,S,R)-2. Absolute configurations of isolated diastereomeric photoproducts in forms of respective lactones 3 and 4 have been determined. First partial diastereoselective photocyclization of 1 leading 10.5% d.e. of (R,S,R)-2 over (S,S,R)-2 has been determined in water as a solvent. To prevent photodegradation of 1 in solution use of brown glass is necessary. Solid formulations of 1 are efficiently protected against photodegradation by the presence of combination of dyes such as yellow iron oxide and pink color E122 or β-carotene inside the formulation or tablet coating.

► Photodegradation of rosuvastatin calcium in solution and solid state. ► First diastereoselective photocyclization of rosuvastatin to corresponding dihydrophenanthrenes in water as reaction media. ► Determination of absolute configuration of dihydrophenanthrene photoproducts. ► Efficient photoprotection of rosuvastatin calcium formulation by certain colored additives.

Keywords
Rosuvastatin calcium; Photodegradation; Dihydrophenanthrene; Diastereoselectivity; Photoprotection
First Page Preview
A study of photodegradation of drug rosuvastatin calcium in solid state and solution under UV and visible light irradiation: The influence of certain dyes as efficient stabilizers
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 252, 15 January 2013, Pages 84–92
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us