Editing Pyridine (section)

===Reagents===
[[File:Alcohol oxidation with Collins reagent.svg|class=skin-invert-image|thumb|Oxidation of an alcohol to aldehyde with the [[Collins reagent]]]]
As a base, pyridine can be used as the [[Karl Fischer reagent]], but it is usually replaced by alternatives with a more pleasant odor, such as [[imidazole]].<ref>{{cite web |url=http://www.ipc.uni-jena.de/downloads/IPC/Lehre/IA_Pharm_12_Karl-Fischer-Titration.pdf |title=Wasserbestimmung mit Karl-Fischer-Titration |trans-title=Water analysis with the Karl Fischer titration |publisher=Jena University |url-status=dead |archive-url=https://web.archive.org/web/20110719105206/http://www.ipc.uni-jena.de/downloads/IPC/Lehre/IA_Pharm_12_Karl-Fischer-Titration.pdf |archive-date=19 July 2011 |df=dmy-all }}</ref>

[[Pyridinium chlorochromate]], [[Cornforth reagent|pyridinium dichromate]], and the [[Collins reagent]] (the complex of [[chromium trioxide|chromium(VI) oxide]]) are used for the oxidation of alcohols.<ref name=b1>{{cite book|last1=Tojo |first1=G. |last2=Fernandez |first2=M. |title = Oxidation of alcohols to aldehydes and ketones: a guide to current common practice|year = 2006|publisher = Springer|location = New York|isbn = 0-387-23607-4|url=https://books.google.com/books?id=O6USLyDIBOUC&pg=PA86|pages=28, 29, 86}}</ref>