  We propose a new method for the computation of quantum three-point functions
for operators in su(2) sectors of N=4 super Yang-Mills theory. The method is
based on the existence of a unitary transformation relating inhomogeneous and
long-range spin chains. This transformation can be traced back to a combination
of boost operators and an inhomogeneous version of Baxter's corner transfer
matrix. We reproduce the existing results for the one-loop structure constants
in a simplified form and indicate how to use the method at higher loop orders.
Then we evaluate the one-loop structure constants in the quasiclassical limit
and compare them with the recent strong coupling computation.
