A SCART to HDMI adapter should work, however the ones I've tried are not good for gaming due to significant latency problems.
I wouldn't expect your monitor to sync to the Amiga signal directly through VGA. You can try as sometimes you get surprised, but don't get your hopes up. You can't see it from the specs, so the only way to find out is to find someone with the same monitor who tried it, or try it yourself.
Last edited by demolition; 06 July 2016 at 21:03.