Selling an asset to a self directed 401K

[Monte Young]

I own a tri-plex with a partner 50/50.  i plan to sell her my half interest for the debt plus 100K with no cash changing hands.  I will then sell a property owned by my 401K.  With those funds I will purchase the property I sold to my partner taking out the full debt and giving her 100K.   These are two separate transactions.  will this be allowed under the rules for self directed 401k's