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D99234

Sigma-Aldrich

Diethyl phosphite

98%

Synonym(s):

Diethoxyphosphine oxide, Diethyl acid phosphite, Diethyl hydrogen phosphite, Diethyl phosphonate, Hydrogen diethyl phosphite

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$66.06

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250 G
$66.06

About This Item

Linear Formula:
(C2H5O)2P(O)H
CAS Number:
762-04-9
Molecular Weight:
138.10
Beilstein/REAXYS Number:
605759
EC Number:
212-091-6
MDL number:
MFCD00044573
UNSPSC Code:
12352100
PubChem Substance ID:
24894335
NACRES:
NA.22

$66.06

List price$71.80Save 8%
Web-Only Promotion

Available to ship onApril 08, 2025Details

Request a Bulk Order

Quality Level

200

assay

98%

form

liquid

refractive index

n20/D 1.407 (lit.)

bp

50-51 °C/2 mmHg (lit.)

density

1.072 g/mL at 25 °C (lit.)

SMILES string

[H]P(=O)(OCC)OCC

InChI

1S/C4H11O3P/c1-3-6-8(5)7-4-2/h8H,3-4H2,1-2H3

InChI key

MJUJXFBTEFXVKU-UHFFFAOYSA-N

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General description

Diethyl phosphite is the organophosphorus compound used as a phosphorylating agent in organic synthesis.[1][2][3]

Application

Applications of diethyl phosphite (DEP):
  • It can undergo condensation with aldehydes or ketones and an amine to form α-aminophosphonates under solvent-free and catalyst-free conditions.[1]
  • Reduction of gem-dibromo derivatives using diethyl phosphite in the presence of triethylamine gives monobromocyclopropanes.[3]
  • Along with 4-dimethylaminopyridine, it can be used as a ligand for nickel-catalyzed cross-coupling of aryl and heteroaryl bromides, chlorides or sulfonates with arylzinc reagents.[2]
  • It can be used for the catalytic asymmetric hydrophosphonylation of enones in the presence of a dinuclear zinc complex to form γ-oxo-phosphonates.[4]
  • DEP can undergo Michael addition to α,β-unsaturated malonates to form β-phosphonomalonates in the presence of recyclable nano γ-ferric oxide-pyridine based catalyst.[5]

pictograms

CorrosionExclamation mark
GHS05,GHS07

signalword

Danger

hcodes

H317,H318

Hazard Classifications

Eye Dam. 1 - Skin Sens. 1B

Storage Class

10 - Combustible liquids

wgk_germany

WGK 1

flash_point_f

179.6 °F - closed cup

flash_point_c

82 °C - closed cup

ppe

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

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Certificates of Analysis (COA)

Lot/Batch Number
BCCL3365
BCCK8156
BCCF8593
BCCC0544
BCBW7242

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An efficient Negishi cross-coupling reaction catalyzed by nickel (II) and diethyl phosphite.
Gavryushin A, et al.
Tetrahedron, 62(32), 7521-7533 (2006)
A simple and green procedure for the synthesis of α-aminophosphonate by a one-pot three-component condensation of carbonyl compound, amine and diethyl phosphite without solvent and catalyst.
Ranu B C and Hajra A
Green Chemistry, 4(6), 551-554 (2002)
Phospha-michael addition of diethyl phosphite to α,β-unsaturated malonates catalyzed by nano γ-Fe2O3-pyridine based catalyst as a new magnetically recyclable heterogeneous organic base.
Sobhani S, et al.
Applied Catalysis A: General, 454, 145-151 (2013)
Reduction of gem-dibromides with diethyl phosphite.
Hirao T, et al.
The Journal of Organic Chemistry, 46(18), 3745-3747 (1981)
Highly Enantioselective 1,4?Addition of Diethyl Phosphite to Enones Using a Dinuclear Zn Catalyst.
Zhao D, et al.
Chemistry?A European Journal , 15(12), 2738-2741 (2009)
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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

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    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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