It is argued that N = 6 supergravity on AdS(5), with the gauge group SU(3)
x U(1) corresponds, at the classical level, to a subsector of the 'chiral'
primary operators of N = 4 Yang-Mills theories. This projection involves a
'duality transformation' of N = 4 Yang-Mills theory and therefore can be va
lid if the coupling is at a self-dual point, or for those amplitudes that d
o not depend on the coupling constant.