[Shadow]

The hydrogen atom attached to the alpha carbon atom in pyrrole won't couple with the N-H proton,because in DCl, the H will exchange with D, and HOD is produced. What if DMF, was used as a solvent? Would the N-H proton of pyrrole couple with the alpha carbon's hydrogen atom?

[discodermolide]

Yes it would. Exchange of H for D is a standard method in NMR to detect the presence of exchangeable protons. Either a signal vanishes or gets smaller, if the exchange is slow. Or the integral of a signal decreases because the exchangeable proton lies underneath another signal of multiplet.