Aminophosphines Derived from N-Phenylpiperazine and N-Ethylpiperazine: Synthesis, Oxidation Reactions, and Molybdenum Complexes

Functionalized aminophosphine of the type Ph2PNR2 (1,2) have been synthesized by treating Ph2PCl with N-phenylpiperazine or N-ethylpiperazine. Oxidation of these ligands with aqueous hydrogen peroxide, elemental sulfur or selenium afforded the corresponding phosphine oxides 3,4, sulfides 5,6, and selenides 7,8 in good yields. The molybdenum complexes of the aminophosphines have been obtained. All new compounds were fully characterized by IR, NMR, and microanalysis, and the molecular structures of two representative compounds were determined by single-crystal X-ray crystallography. (C) 2011 Wiley Periodicals, Inc. Heteroatom Chem 22: 679-686, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/hc.20733