3058 2004 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim DOI: 10.1002/anie. 200453820 Angew. Chem. Int. Ed. 2004, 43, 3058–3060 coordination chemistry and homogeneous catalysis,[1] but to date the most widely used procedures for obtaining secondary cyclic phosphanes give very low overall yields (3–5%).[2–5] Secondary phosphanes are prepared by multistep procedures in which the final step is reduction of a phosphorus compound ...