A rapid synthesis of the enantiomerically pure biary catalyst (S)-1 was accomplished by a stereoselective Ullmann reaction (Scheme 1). © 1993.
Nelson, T. D., & Meyers, A. I. (1993). The synthesis of a useful chiral biaryl catalyst. An oxazoline-mediated Ullmann reaction. Tetrahedron Letters, 34(19), 3061–3062. https://doi.org/10.1016/S0040-4039(00)93379-3