Since Count Dooku worked closely with Darth Sidious to undermine the Republic both internally and externally, he might have known about Order 66. He could have used the Clone Troopers to destroy the Jedi himself. Or he could have turned the troopers against Darth Sidious and ended the destructive conflict to bring order to the galaxy.
Did Count Dooku ever know about Order 66?
If so, when did he find out?
If not, did Darth Sidious ever plan to use Order 66 against Count Dooku? (Or maybe Sidious had a separate secret order for the Clone Troopers to take out Dooku and other Separatist leaders.)
Please provide answers from canon sources.