I'd imagine that life could evolve in other substances under the right conditions (although I'm not very familiar with that). As long as the organisms are adapted to that substance it should be more than possible. We still aren't entirely sure how life actually originates, and right now it's mostly theoretical guess work. Some people believe life on Earth started in our oceans, others believe extremophiles may have landed on Earth on asteroids and given rise to life.

Thanks for the formatting code!