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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

Quality Level

100

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

signalword

Warning

Hazard Classifications

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

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
STBJ5025
STBD5835V
01830PH
S34159
08601TD

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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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