153048-16-9Relevant academic research and scientific papers
UMSETZUNG VON TRIMETHYLSILOXYPHOSPHORYLVERBINDUNGEN MIT BORTRIFLUORID-ETHERAT; DARSTELLUNG UND NMR-SPEKTROSKOPISCHE UNTERSUCHUNG VON DONATOR-AKZEPTOR-KOMPLEXEN MIT DER PHOSPHORYL-GRUPPIERUNG ALS DONATOR
Well, Michael,Fischer, Axel,Jones, Peter G.,Schmutzler, Reinhard
, p. 157 - 172 (2007/10/02)
The reaction of the α-trimethylsiloxy-phosphoryl compounds Ph2C=C(OSiMe3)P(:O)R2 with F3B*OEt2 yielded the donor-acceptor-complexes 1-3 by cleavage of the Si-O bond and elimination of Me3SiF and Et2O.The complexes 4 and 5 were formed analogously by the reaction of Me(Ph)C=C(OSiMe3)P(:O)R2 with F3B*OEt2.The reaction of dimethyl- and diphenyl-2-trimethylsiloxy-3,5-di-tert-butylphenyl phosphinate with F3B*OEt2 produced the seven-membered ring-systems 6 and 7.Analogous products, 8-11, were formed by the reaction of (RO)2P(:O)OR' with F3B*OEt2.The reaction of Me2P(:O)C(OSiMe3)(H)CCl3 with F3B*OEt2 produced the 1:1 complex 12 without cleavage of the Si-O bond.From α-hydroxy phosphine oxides and F3B*OEt2 similarly, the 1:1 complexes, 13 and 14, were formed.Diphenyl-2-hydroxy-3,5-di-tert-butylphenyl phosphinate reacted with F3B*OEt2 to give the 1:1 complex 15.The structure of 15 was confirmed by X-ray structure analysis; the bond lengths at the bridging oxygen are P-O1 151.7, B-O1 152.8 pm.The donor-acceptor interaction between the phosphoryl group and the boron atom was established by 19F-, 31P- and, in the case of 6, 7, 11, and 15, by 11B-n.m.r-spectroscopy.Keywords: Boron trifluoride; phosphoryl group; X-ray structure; donor-acceptor interaction.
