Is it possible to do a naptha extraction on syruan rue seeds to make changa?

This question doesn't make much sense...have you read the numerous rue extraction teks? Are you proposing just soaking rue in naptha to get the harmalas and then using that for changa? Or soaking rue seeds in naptha and evaporating that onto leaves for changa? Either way I'm nearly 100% certain the answer is no. Go do some reading on the wiki about the different harmala extractions.

Sorry i presumed i could do a similar extraction that people do with caapi, i read a few tek´s and will trythem

it wont work for caapi either