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Step 6 is incorrect here: when D2O is used as solvent, the salicylaldehyde formed is completely deuterated at the aldehyde position but nowhere else. It must abstract a proton (or deuteron) from the solvent rather than taking it straight from the carbon, or maybe (possibly more likely?) it forms a double bond to the aromatic ring when it adds in. Nessa Carson ( talk) 22:25, 25 February 2011 (UTC) reply

The URL of the Reimer-Tiemann reaction article makes it difficult to link to, at least for some text-encoding systems. The URL currently has an en-dash (unicode 2013) between Reimer and Tiemann
/info/en/?search=Reimer–Tiemann_reaction
Copying this URL and pasting it into a browser works fine, but pasting it into an html file and clicking on the resulting link can make the browser misread the file as
/info/en/?search=Reimer–Tiemann_reaction
and Wikipedia returns an error message for that URL (no such article). Substituting a hyphen (unicode 2010) for the en-dash in the URL
/info/en/?search=Reimer-Tiemann_reaction
gets the browser to the right article via a redirect (Redirected from Reimer-Tiemann reaction)

Can the URL be changed to include the hyphen rather than the dash? Otherwise, copying the displayed URL and pasting it into an html file can cause a broken link. (Details: I am using TextEdit on a MacBook Air running macOS Mojave 10.14.6 to make html files. Browsers that failed to handle the en-dash in the URL from the html file include Safari 14.1.1 and Chrome 91.0.4472.77) — Preceding unsigned comment added by DrPhlogiston ( talk • contribs) 13:46, 4 June 2021 (UTC) reply

 Done. -- Project Osprey ( talk) 13:58, 4 June 2021 (UTC) reply

So just use the URL that links to the hyphen /info/en/?search=Reimer-Tiemann_reaction – it will automatically redirect to the actual title that uses the hard-to-type en dash. – wbm1058 ( talk) 12:06, 14 June 2021 (UTC) reply

See Help:Magic words § Paths and Help:URL § Fixing links with unsupported characters – wbm1058 ( talk) 12:23, 14 June 2021 (UTC) reply