Stoichiometric and homogeneous-catalytic diboration of the n=n double bond of azobenzene |
| |
Authors: | Braunschweig Holger Kupfer Thomas |
| |
Institution: | Institut für Anorganische Chemie, Julius-Maximilians-Universit?t Würzburg, Am Hubland, D-97074 Würzburg, Germany. h.braunschweig@mail.uni-wuerzburg.de |
| |
Abstract: | The diboration of the N=N double bond of azobenzene was achieved by reaction of the 3]diboraplatinametalloarenophanes derived from ferrocene, Fe(eta5-C5H4)B(NMe2)Pt(PEt3)2B(NMe2)(eta5-C5H4)], and bis(benzene)chromium, Cr(eta6-C6H5)B(NMe2)Pt(PEt3)2B(NMe2)(eta6-C6H5)], with an excess of azobenzene in toluene at elevated temperature. The formation of the anticipated ansa-bis(boryl)hydrazines was substantiated by the determination of the molecular structure of the chromium derivative by X-ray diffraction. The synthesis of the ansa-bis(boryl)hydrazine derivative of ferrocene could also be accomplished under homogeneous catalysis conditions. Hence, reaction of the well-known 2]boraferrocenophane, Fe(eta5-C5H4)2B2(NMe2)2], and azobenzene in the presence of 5 mol % Pt(PEt3)3] afforded the bis-borylated hydrazine derivative in good yields. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|