Board Thread:Theories and Speculation/@comment-31099706-20170327120301/@comment-31099706-20170514034749

Well I have provided many facts about it having many reasons.

Itachi has more advantages if Sasuke's unconscious rather than Conscious, like extracting Oro(eg: Sasuke's method of releasing Oro from Anko), like sealing more Amaterasu in Sasuke, for back up plans, and it would have been much easier for Itachi to seal Amaterasu, rather than try to seal with his last breath and total will power to reach Sasuke walking.

And Tsukuyomi never did kill Sasuke or Kakashi. I guess their Sharingan resisted a bit and allowed them to survive it.

So no Itachi didn't wanted to kill Sasuke. But he surely wanted to knock out Sasuke with Tsukuyomi. Well these are all my opinions. But you can also keep your opinion to yourself, and I'll respect that. :)