  We consider the defocusing nonlinear Schr{\"o}dinger equation with a gauge
invariant power-like nonlinearity. We prove global dispersive estimates in a
semi-classical scaling, after rescaling the solution thanks to a suitable
distorsion of the natural dispersion rate. We show a uniform bound on the
modulus of the solution in some space providing compactness properties. We
discuss the consequences of these estimates in the light of both scattering
theory and semi-classical analysis.
