Kukhar, V. P. published the artcileReactions of trialkyl phosphites with polyhalomethanes, Quality Control of 866-23-9, the publication is Zhurnal Obshchei Khimii (1979), 49(7), 1470-4, database is CAplus.
In the reaction of CCl4, CBr4, and CHCl3 with (RO)3P (R = Et, Pr), one, two or three halo atoms are replaceable depending on the corresponding reagents used. Thus, reaction of CCl4 with 2 mols. (EtO)3P gave [(EtO)2P(O)]2CCl2 whereas with 4 mols (EtO)3P it gave [(EtO)2P(O)]2CH2, (EtO)2P(O)Cl, CH2:CH2 and EtCl.
Zhurnal Obshchei Khimii published new progress about 866-23-9. 866-23-9 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyltrichloromethylphosphonate, and the molecular formula is C5H10Cl3O3P, Quality Control of 866-23-9.
Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics