Phosphorous pentaoxide

The isoquinoline framwork is derived from the corresponding acyl derivatives of P-hydroxy-P phenylethylamines. Upon exposure to a dehydrating agent such as phosphorous pentaoxide, or phosphorous oxychloride, under reflux conditions and in an inert solvent such as decalin, isoquinoline frameworks are formed. 

Oxo-butyric acid ethyl ester Sulfuric acid Phosphorous pentaoxide... 

Resorcin reacted with 3-oxo-butyric acid ethyl ester in the presence sulfuric acid and phosphorous pentaoxide and 4-methyl-7-hydroxycoumarine (hymecromone) was obtained. 

Dibenzo[fr,d]pyran 475 was obtained when the tetraketone 384 was treated with phosphorous pentaoxide or p-toluenesulfonic acid in boiling benzene (83ZOR2322) (Scheme 100). 

Vegetable oils and natural fats are traditional raw materials for the production of soaps and other surfactants. Coconut oil, palm and palm kernel oil, rape oil, cotton oil, tall oil, as well as the fats of animal origin (tallow oil, wool wax), present renewable raw sources. Linear paraffins and olefins (with terminal or internal double bond), higher synthetic alcohols, and benzene are fossil sources for surfactant production which are obtained from oil, natural gas and coal. Other auxiliary materials are required to construct amphiphilic surfactant structure, such as ethylene oxide, sulphur trioxide, phosphorous pentaoxide, chloroacetic acid, maleic anhydride, ethanolamine, and others. 

This subcategory involves phosphoric acid (dry process), phosphoms pentoxide, phosphoms pentasulfide, phosphoms trichloride, and phosphoms oxychloride. In the standard dry process for phosphoric acid production, liquid phosphoms is burned in the air, the resulting gaseous phosphoms pentaoxide is absorbed and hydrated in a water spray, and the mist is collected with an electrostatic precipitator. Regardless of the process variation, phosphoric acid is made with the consumption of water and no aqueous wastes are generated by the process. 

Formula P2O5 MW 141.95 exists as P4O10 units as molecular entities Synonyms phosphorus pentaoxide phosphorus(V) oxide phosphoric anhydride... 

Chloric acid, in conjunction with catalysts (particularly vanadium pentaoxide), is used for the oxidation of aldonic acids or lactones to the 2-glyculosonic acids. Thus, D-glucono-1,4-lactone (9) and potassium D-galactonate in methanol, in the presence of phosphoric acid and vanadium pentaoxide, are oxidized by chloric acid to methyl D-arabino-2-hexulosonate (10) and methyl D-/yxo-2-hexulosonate, respectively.38 At moderate temperatures in the absence of a catalyst, aldoses, ketoses, and sucrose are inert to the action of chlorates over a several weeks time period 39 bromates in alkaline solution also exert no oxidative action (Scheme 5). 

As pyrimidine nucleosides are rather stable under acidic conditions, they may be phosphorylated with a mixture of 85% phosphoric acid and phosphorus pentaoxide ( polyphosphoric acid )- The 2, 3 -0-isopropylidene acetals of uridine and of cytidine were treated with polyphosphoric acid for two hours at 60°. After acid hydrolysis, the 5 -phosphates of these nucleosides were obtained in good yield. 2, 3 -0-Benzylidenecytidine was phosphorylated similarly to cytidine 5 -phosphate. The polyphosphoric acid method was also used to convert the 2, 3 -0-isopropylidene acetals of 5-bromouridine, 3-methyluridine, and A -methyl- and A -dimethyl-cytidine into their respective nucleoside 5 -phosphates. 

Structure hexagonal crystals, can be modified to several crystalline and amorphous forms, dimerizes to P4O10 Synonyms phosphorus pentaoxide phosphoric anhydride phosphorus (V) oxide... 

Synonyms Diphosphorus pentoxide Phosphoric anhydride Phosphorus (V) oxide Phosphorus pentaoxide... 

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