Hi Caíque Escaler,
Yes it is very much possible to replicate Org unit to CRM via middleware, though delta is not supported. So if you do any further changes in Org unit in your backend system you have to do the same changes manually in CRM.
Check the best practice C01.
You can access the same from http://help.sap.com/bp_crmv12007/CRM_DE/HTML/index.htm
Tech Information -> Building Block Lib.
Hope this will help.