If you have an account in sendtoreader.com, you can achieve that by prepending "s2r.me/" to the URL, that is, changing "http://whatever" by "http://s2r.me/whatever". Note that this will open the browser anyway, as you need to contact sendtoreader to pass it the link, but you should have it converted to ebook next time you sync content.
http://sendtoreader.com/blog/tips/s2...dle-to-kindle/