Though Amino Acids have been seen to naturally develop in the lab using what we think was contained within the "primordial soup", not only have we never seen these Amino Acids develop into far more complex molecules.
Not only this, but we do not know for sure what was contained within the "primordial soup", it is purely speculative.
Even in space within the giant molecular clouds, we have not observed anything more complex than simple Amino Acids.
We have also never directly observed Amino Acids on any planets, let alone on planets contained within an orbit that we classify as suitable to life similar to ours.
The value for life that evolves into intelligent life is 100% speculation. There are also a huge number of estimated values that put us as the only intelligent civilisation in the Universe.