cinnamon and gnome-menus2 are not found
 

I just did fresh install of arch. I have installed xorg, vim, and other numerous. Now when I wanted to install Cinnamon as DE for the system. I used following command it gives an error message that - target not found: cinnamon

but It do exist, as we can see here - https://aur.archlinux.org/packages/cinnamon/

Same is case with gnome-menus2. I have tried using pacman -Syyu. It refreshes core extra and community repositories

solved
 

->install yaourt from here - http://archlinux.fr/yaourt-en#get_it
->install from yaourt instead of pacman.

Actually cinnamon etc. are not standard package. So, pacman doesn't support them