different name in convert?

hi, i have this command…

soffice --headless --convert-to csv outdir /tmp file_1.xlsx
it works,
but I need to change the name to file_2.csv
Something like…

soffice --headless --convert-to csv outdir /tmp/file_2.csv file_1.xlsx // ERROR
or
soffice --headless --convert-to csv outdir /tmp outfile file_2.csv file_1.xlsx // ERROR

sorry for my english