Photo-Therm gives instructions for developing ECN-2 film using C-41 chemicals in their processor.

The Remjet coating is an issue. In a conventional C-41 process this might foul the solutions. However, Photo-Therm is a one-shot processor, so fouling due to the Remjet coating should not be much of an issue, at least not according to the Photo-Therm people.

I don't know if the quality is any good. However, Photo Engineer consistently warns against developing ECN-2 film using C-41 chemistry, and he probably knows better than any of us.