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2. Leung, P.-H.; He, G.; Lang, H.; Liu, A.; Loh, S. K.; Selvaratnam, S.; Mok, K. F.; White, A. J. P.; Williams, D. J. Tetrahedron 2000, 56, 7, and references cited therein. Leung, P. H.; Liu, A.; Mok, K. F. Tetrahedron: Asymmetry 1999, 10, 1309.
3. Lasne, M. C.; Ripoll, J. L. Synthesis 1985, 33, 121.
4. Crystal data for (Rc,Sp)-2: [C34H37ClNO2PPdS] 0.5 H2O, M=705.53, orthorombic, space group P212121, a=12.375(1), b=12.814(1), c=43.040(1) Å, V=6825.0(1) Å3, Z=8, Dc=1.373 g cm−3, μ(Mo-Kα)=7.61 cm−1, F(000)=2904. A pale yellow prism with dimensions 0.23×0.20×0.20 mm was used for diffraction studies. A total of 16257 independent reflections were measured on a Siemens SMART CCD diffractometer with Mo-Kα radiation (graphite monochromator) using ω-scans. All of the non-hydrogen atoms were refined anisotropically. In the full-matrix least-squares based on F2 with absorption corrected data to give R1=0.065, wR2=0.140. The absolute stereochemistry was determined unambiguously by refining the Flack parameter [x=0.00(3)]. The pure complex (Rc,Sp)-2 crystallized with two crystallographically independent molecules in the asymmetric unit. Both molecules have identical absolute configurations and may be considered only as the rotamers about the rotatable monodentate Pd–P bond. In one molecule the SO2Ph moiety is disordered.