Jeez, this is actually getting more convoluted. It sounds like you need to be collaborating with someone that has a solid organic chemistry background, there are many issues with the syntheses you have tried that an organic chemist would have spotted right away and saved you the trouble.
Let me ask you, the diagram I've attached, is this along the lines of what you're looking for? It matters because you talked about oxidizing the hydroxyl groups to carboxylic acids (this route has fundamental flaws, both in the design and the materials used, but that's another story for another time) and then coupling them to the amine using EDC. Thing is, that would give you an amide, not the amine, and that would change the properties of your molecule. You also suggest the epoxide route, but that would give you yet a different product.
So I guess my main question is, what exactly is it that you're trying to do? You've tried several different things and they all seem to lead to different product (some of the synthetic routes are the equivalent of driving into a brick wall). So it seems like you're just concerned with attaching the sulfonamine, but simply doing that will not guarantee your success in this experiment nor will it gain you any good understanding of what's going on unless you account for the potential variables (ie; what will the reactivity difference be between a sulfonamide and sulfonamine?)