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A Rh(I)-catalyzed asymmetric 2 + 2 + 2 cycloaddition of achiral ynamides is described here. This work demonstrates a unique concept of stereochemical control of both the C-C and C-N axial chirality and provides an approach to the synthesis of chiral N,O-biaryls as well as chiral anilides.
Oppenheimer et al. (Sat,) studied this question.