diphenylphosphite
{{Chembox
| ImageFile = Diphenylphosphite.png
| ImageSize = 132
| PIN = Diphenyl phosphonate
| OtherNames = Phosphonic acid, diphenyl ester
|Section1={{Chembox Identifiers
| CASNo = 4712-55-4
| CASNo_Ref = {{cascite|correct|CAS}}
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 5144JS6XUM
|PubChem = 426896
| ChemSpiderID = 377689
| ChEMBL = 132913
| InChI = 1S/C12H11O3P/c13-16(14-11-7-3-1-4-8-11)15-12-9-5-2-6-10-12/h1-10,13H
| InChIKey = FYOYCZHNDCCGCE-UHFFFAOYSA-N
| SMILES = C1=CC=C(C=C1)OP(O)OC2=CC=CC=C2
}}
|Section2={{Chembox Properties
| C=12|H=11|O=3|P=1
| Appearance = colorless liquid
| Density = 1.2268 g/cm3
| MeltingPtC = 12
}}
}}
Diphenyl phosphite is a diorganophosphite with the formula (C6H5O)2P(O)H. The molecule is tetrahedral. It is a colorless viscous liquid. The compounds can be prepared by treating phosphorus trichloride with phenol. Many analogues can be prepared similarly. One illustrative reaction, diphenylphosphite, aldehydes, and amines react to afford aminophosphonates (Kabachnik–Fields reaction).{{cite journal|title=An Extremely Efficient Three-Component Reaction of Aldehydes/Ketones, Amines, and Phosphites Kabachnik-Fields reaction for the Synthesis of α-Aminophosphonates Catalyzed by Magnesium Perchlorate|author1=Bhagat, Srikant |author2=Chakraborti, Asit K. |journal=Journal of Organic Chemistry|year=2007|volume=72|issue=4 |pages=1263–1270|doi=10.1021/jo062140i|pmid=17253748 }}