so (to) not to...
Correct me please. How do you say, for example:
_I should do this, so to not to put any obstacle in front of me_

Are two 'to's required? If not, then which one isn't necessary?

Question

so (to) not to...
Correct me please. How do you say, for example: 
_I should do this, so to not to put any obstacle in front of me_

Are two 'to's required? If not, then which one isn't necessary?

Answer

I think i understand what you mean.

I should do this so as to not put any obstacles in front of me.

The as is important in giving the meaning. But I am afraid I do not know the Gramatical rule for this.

Answer

I should do this, so don't put any obstacles in front of me.

I need to do this so don't put any obstacles in my way.

I should do this, so best not to put any obstacles in front of me.