469. Diphosphine dioxides. Part II. Some diphosphine dioxides with mono-, di-, and tri-methylene bridges
作者:Gennady M. Kosolapoff、Robert F. Struck
DOI:10.1039/jr9610002423
日期:——
MADING, P.;SCHELLER, D., Z. ANORG. UND ALLG. CHEM., 567,(1988) N2, C. 179-191
作者:MADING, P.、SCHELLER, D.
DOI:——
日期:——
Modified polyethylenephosphinic acids and their salts
申请人:Sicken Martin
公开号:US20070027297A1
公开(公告)日:2007-02-01
The invention relates to polymeric phosphinic acids and their salts of the formula (I)
where X is hydrogen or 1/m of a metal of valency m, or is a protonated nitrogen base,
R
1
and R
2
are identical or different and are hydrogen, a carboxy group, a carboxylic acid derivative, an unsubstituted or substituted alkyl group having from 1 to 10 carbon atoms, phenyl, benzyl, or alkyl-substituted aromatic systems, R
3
and R
4
may be identical or different and are an unsubstituted or substituted alkyl group having from 2 to 20 carbon atoms, or are OX, with the above meaning for X, and
u
is the average number of monomer units. The invention further relates to a process for preparing the abovementioned compounds, and to their use.
US7348396B2
申请人:——
公开号:US7348396B2
公开(公告)日:2008-03-25
A Convenient Synthetic Protocol to 1,2-Bis(dialkylphosphino)ethanes
作者:Laurence R. Doyle、Alex Heath、Choon Heng Low、Andrew E. Ashley
DOI:10.1002/adsc.201300787
日期:2014.2.10
1,2-Bis(dialkylphosphino)ethanes are readily prepared from the parent phosphine oxides, via a novel sodium aluminium hydride/sodium hydride reduction protocol of intermediate chlorophosphonium chlorides. This approach is amenable to multi-gram syntheses, utilises readily available and inexpensive reagents, and benefits from a facile non-aqueous work-up in the final reductive step.