Phosphorochloridite

Add links
Source: Wikipedia, the free encyclopedia.

In

phosphites (P(OR)3). They are usually colorless and sensitive toward hydrolysis and, to some extent, oxidation to the corresponding phosphorochloridates
((RO)2P(O)Cl).

Synthesis and reactions

Structure of 2,2'-biphenylene phosphorochloridite.

Phosphorochloridites are produced by partial

alcoholysis of phosphorus trichloride, which proceeds stepwise:[1]

PCl3 + ROH โ†’ HCl + (RO)PCl2 (phosphochloridite)
(RO)PCl2 + ROH โ†’ HCl + (RO)2PCl (phosphodichloridite)
(RO)2PCl + ROH โ†’ HCl + (RO)3P (phosphite)

These reactions are readily controlled with aromatic

binaphthol
and 2,2'-biphenol.

Phosphorochloridites are precursors to diphosphite ligands. When combined with rhodium precursors such as Rh(acac)(CO)2, these diphosphite ligands afford catalysts that are used industrially for the hydroformylation of alkenes.[2] it and related ligands have become popular in hydroformylation catalysis.[3][4]

References

  1. ISBN 9781118299715
    .
  2. ^ Billig, Ernst; Abatjoglou, Anthony G.; Bryant, David R. (1988). "Homogeneous Rhodium Carbonyl Compound-Phosphite Ligand Catalysts and Process for Olefin Hydroformylation". US 4769498 a 19880906 to Union Carbide.
  3. doi:10.1021/ja00058a079
    .
  4. doi:10.1021/OM950549K
    .
Retrieved from "https://en.wikipedia.org/w/index.php?title=Phosphorochloridite&oldid=1167086862"