Phosphoric acid monoester mixed

Dicyclohexylcarbodiimide Mixed phosphoric acid diesters from phosphoric acid monoesters... 

Obviously then, any situation where an alkyl phosphoric add ester-hydrocarbon mixture is liquid or even partially liquid will lead to some measure of selective migration into the powder and therefore antifoam deactivation. Such situations could occur during periods of storage of the powder at elevated temperatures or when the antifoam is sprayed directly onto hot powder immediately after production from a spray-drying tower, as described by Curtis et al. [35]. The antifoam exemplified in this patent consisted of a mixture of a commercial (Cig-Cig) alkyl phosphoric acid monoester and a petroleum jelly, which is a hydrocarbon gel at ambient temperatures with a carbon number >25. Mixing petroleum jelly with the phosphoric acid monoester in the preferred ratio of 1 3 by weight produces an effective antifoam precursor with a drop melting point of 58°C. Curtis et al. [35] describe both full-plant scale... 

The preparation of phosphate esters has been reviewed and full details have appeared of the use of 2-chloromethyl-4-nitrophenyl esters (reported last year) in the synthesis of monoesters and mixed dialkyl esters of phosphoric acid. 

Phosphorylation of alcohols and amines forming mixed esters of phosphoric acid and phosphorami-dates, respectively, is effected by triphenylphosphine and 2,2 -dipyridyl disulfide. The reaction passes through a triphenylphosphonium phosphate of type (68 equation 44) as an active intermediate. Formation of an intemucleotide linkage can be achieved by this method. °° Dimerization of monoesters of phosphoric acid producing dialkyl pyrophosphates is achieved using tributylphosphine and dibenzoyl-ethylene or p-quinonedibenzimide (equation 45). A phosphonium phosphate is the active intermediate of this reaction. ... 

Addition of hypophosphorous acid, PH(OH)2 to Schiff bases, yielding (l-aminoalkyl)phosphorous acids, can also be effected by mixing the three reactants.129 Further, Schiff bases have also been added to dialkyl thiophos-phites,130 phosphonous monoesters,130 secondary phosphine oxides,117 and metal derivatives of secondary phosphines 131 these phosphides, however, give well-defined products only after hydrolytic working up to phosphine oxides. 

In the biosphere, triesters of orthophosphoric acid are unknown, however, this does not exclude the possibility that this binding may be present in certain macromolecules. The diesters of orthophosphoric acid which exist in the biosphere are often mixed esters. Acid or alkaline hydrolysis slowly transforms them into monoesters. Most of the complex lipides are diesters and vitamin also falls into this category. The mono-phosphoric esters of alcohols form a very important biochemical group. The two free acid groups are more strongly acidic than when they were... 

---