Phosphorus-containing Acids

There is a distinct difference between the esters of phosphorus-containing acids with alcohols and ethoxylated structures, on the one hand, and compounds... 

A variety of reaction conditions have been employed for Pudovik-type additions to imines, including the use of additional tertiary amines,323 324 sodium hydride,325 and sodium ethoxide,326/327 as well as monobasic trivalent phosphorus-containing acids.319/328-340... 

Analogues of (751) react with derivatives of phosphorus-containing acids to form 1-phosphoryl-imidazoles (90CHE599). The same compound also silylates ketones to give enol silyl ethers and/or siloxyalkylimidazoles (Scheme 107) (87JC271). 

The toxicokinetics of white phosphorus smoke are likewise unknown. White phosphorus smoke is primarily oxides and acids of phosphorus, with some residual unbumt white phosphorus (refer to Chapter 3 for a detailed description of the composition of white phosphorus smoke). The fates of airborne white phosphorus, and the phosphorus oxides and phosphorus-containing acids originating from the combustion of white phosphorus, are largely unknown. 

Tempesti et al. (238) used organoboronic acids (lib) for the immobilization of Mo(VI). It is assumed that the interaction of Mo occurs through a condensation with the supported acid. Reactions reported with the bimetallic material showed an activity and selectivity comparable to those of homogeneous bimetallic analogs. In a comparable approach, Mo was anchored to immobilized phosphorus-containing acids, for example, of cellulose phosphate (11c) (239) or phosphonate resins (11a) (240). 

A related reaction that yields the same types of products as does the Michaelis-Arbuzov reaction begins with either a phosphinous acid or a monoester of a phosphonous acid. (The corresponding reaction may also be performed with a diester of phosphorous acid.) By treatment with an appropriate base, the conjugate base of the phosphorus-containing acid is generated that serves as the nucleophihc reagent for direct formation of the phosphonate or phosphine oxide product (or phosphonate product from a phosphorous acid diester). This procedure is commonly referred to as the Michaehs Becker reaction. ... 

TaMe 10. Effect of the structure of phosphorus-containing acids on the fire-resistance of their ceBulose esters... 

The phosphorus tribromide boiled at 171-173 /ybo mm., 168-170V72S mm., and was prepared in 90-95 per cent yield by adding bromine to a stirred suspension of red phosphorus in carbon tetrachloride. A good fractionating column is necessary. Old red phosphorus containing acids of phosphorus gives a poorer yield. 

A-Phosphorylated imidazoles and benzimidazoles can be made by direct phosphorylation by halides, esters, amides, amidoesters, isocyanates, and thiocyanates of phosphorus-containing acids, or from reaction of phosphonic or phosphinic imidazolides with a sulfonic acid or anhydride <82CB1636>. Stable charge transfer complexes are produced when a 1 1 or 1 2 ratio of imidazole (or benzimidazole) and sulfur trioxide are refluxed in ether, dioxane, THE, or 1,2-dichloroethane. These complexes are stable on storage in the absence of water and have sharp melting points. Indeed, the benzimidazole SO3 complex must be boiled for five hours in water to decompose it. On fusion, the complexes form the C-sulfonic acids (see Section 3.02.5.3.3) <87CHE1084>. Sulfonyl chlorides readily A-sulfonate imidazoles <94JMC332>. 

Analogues of (177) react with derivatives of phosphorus-containing acids to form 1-phos-... 

Ion Chromatography. - Organic phosphorus-containing acids and their thio- and dithio- analogues have been analysed by ion chromatography 2 and the microdetermination of phosphorus in organic compounds has been accomplished. ... 

Table 1.3. Ladder of selected pK F(jiB+) values, mainly for phosphorus-containing acids ...

Group 14 Metals - Tin and Lead 173 Phosphates and derivatives of other phosphorus-containing acids... 

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