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287881

Sigma-Aldrich

Diphenylphosphine oxide

97%

Synonym(s):

HPOPh2

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About This Item

Linear Formula:
(C6H5)2P(O)H
CAS Number:
4559-70-0
Molecular Weight:
202.19
MDL number:
MFCD00002079
UNSPSC Code:
12352002
PubChem Substance ID:
24857300
NACRES:
NA.22

Assay

97%

form

solid

reaction suitability

reagent type: ligand
reaction type: Buchwald-Hartwig Cross Coupling Reaction
reagent type: ligand
reaction type: Hydrophosphonylations
reagent type: ligand
reaction type: Suzuki-Miyaura Coupling

mp

56-57 °C (lit.)

functional group

phosphine

SMILES string

O=[PH](c1ccccc1)c2ccccc2

InChI

1S/C12H11OP/c13-14(11-7-3-1-4-8-11)12-9-5-2-6-10-12/h1-10,14H

InChI key

ASUOLLHGALPRFK-UHFFFAOYSA-N

Application

Diphenylphosphine oxide can be used as a coupling partner to prepare various organophosphorus compounds via cross-coupling reaction with aryl halides in the presence of Ni/Zn catalyst.
It can also be used as a reactant to synthesize:
  • Diphenyl(2-phenyl-2H-indazol-3-yl)phosphine oxide derivatives by phosphonylation of 2H-indazoles using rose bengal as a catalyst.
  • Alkenyldiphenylphosphine oxides by hydrophosphinylation of terminal alkynes in the presence of transition metal catalysts.
  • Diphenylphosphino-containing chiral ligands for asymmetric catalytic reactions via Pd-catalyzed coupling reaction with aryl triflates.
  • Triarylphosphine oxides and Horner-Wittig reagents.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H302,H315,H319,H335

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Kurz, L.; Lee, G.; Morgans, D. et al.
Tetrahedron Letters, 31, 632-632 (1990)
Li-Biao Han et al.
Organic letters, 7(14), 2909-2911 (2005-07-01)
[reaction: see text] Diphenylphosphine oxide and related P(O)H compounds react with propargyl alcohols at room temperature in the presence of a catalytic amount of Ni(0) complex and Ph(2)P(O)OH to produce high yields of phosphinoyl 1,3-dienes though an efficient in situ
Edwards, M. L.; Stemerick, D. M. et al.
Tetrahedron Letters, 31, 5571-5571 (1990)
Li-Biao Han et al.
Journal of the American Chemical Society, 126(16), 5080-5081 (2004-04-22)
The cheap nickel catalysts are more reactive than the corresponding noble metal catalysts in the catalytic additions of a variety of P(O)-H bonds and an S-H bond to alkynes, affording regio- and stereoselectively both the Markovnikov and the anti-Markovnikov adducts
Recent progress in the synthesis of phosphorus-containing indole derivatives
Chen L and Zou Y-X
Organic & Biomolecular Chemistry, 16(41), 7544-7556 (2018)
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