2‐Aryl‐dibenzo‐1,2‐oxaphosphorine as a ligand in borane and in Pt(II) complexes

Optimum conditions for the synthesis of aryl-dibenzo-oxaphosphorines (2) from the corresponding phosphonous chloride (1) were explored to avoid the formation of by-products (e.g., 4–6). The aryl-dibenzo-oxaphosphorines (2) were converted to the P-oxides (3), and were utilized in the synthesis of phosphinite-boranes 7 and Pt(II) complexes 8. Depending on the aryl substituent, the Pt(II) complex (8) was formed with cis and trans geometry. © 2004 Wiley Periodicals, Inc. Heteroatom Chem 15:459–463, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20042