Need to be reindexed quickly - SERP is showing a 404

[mattdinbrooklyn]

So there was a mistake made where a 404 error was placed in the canonical URL for the pages my company made. We need to have these pages quickly reindexed. I asked GWT to fetch them and have an updated sitemap but the SERPs are still the same. Any tricks anyone knows that would allow me to get reindexed faster?

[JimmyPage]

Pretty sure you've covered all you can do.  You could also try building some links to these updated pages.

[gazzerman1]

Fetch is the best and fastest way. Chances are Googlebot came to your site right away and is prioritizing those changes in the SERPS update.

Give it 24hrs, sometimes I see changes like that happen in under a minute other times it can take many hours.

[MattAntonino]

Agree with James & Gary that you've done the right things and it may just take time.

That being said, I've had a LOT of success in the past with adding a link to your sitemap in a G+ post. Now, correlation is not causation so it may just be Google getting around to the earlier suggestions - but I've seen it help even when I didn't have WMT access to do a fetch in the first place. So I would definitely also link to your site &/or your sitemap on G+ and create a link that way. As James said "try building some links" - that would be the first one I try.