Phosphoric acid esters phosphorodichloridate

Cyclic phosphoric acid esters from phosphorodichloridates O... [Pg.60]

Phosphoric acid esters from phosphorodichloridates OPOGlg OPO(OR)2 s. 13,165... [Pg.67]

Phosphonic acid, (phthalimidomethyl)-, diethyl ester, 65, 119 Phosphorazidic acid, diphenyl ester (26386-88-9), 68,1 Phosphoric triamide, hexamethyl- (680-31-9), 66, 51, 94 Phosphorodichloridic acid, 2-chloroethyl ester, 65, 68 Phosphorous acid, triethyl ester, 65, 108.119 Phosphorus oxychloride, 66,173, 176 67,1 68, 41,162 Phosphorus tribromide (7789-60-8), 67, 210 Phthalimide, N-(bromoethyl)-, 65, 119 Phthalimide, N-(hydroxymethyl)-, 65,119 Pig liver esterase, 69, 20... [Pg.157]

PHOSPHORIC ACID, TRISODIUM SALT see SJH200 PHOSPHORIC ACID, TRITOLYL ESTER see TNP500 PHOSPHORIC BROMIDE see PHR250 PHOSPHORIC CHLORIDE see PHR500 PHOSPHORIC SULFIDE see PHSOOO PHOSPHORIC TRIS(DIMETHYLAMIDE) see HEKOOO PHOSPHOROCHLORIDOTHIOIC ACID-0,0-DIMETHYL ESTER see DTQ600 PHOSPHORODICHLORIDIC ACID, ETHYL ESTER see EOROOO... [Pg.1841]

Phosphoric acid diesters from phosphorodichloridates—Simultaneous removal of protective groups s. 13, 284 Pyrophosphoric acid esters... [Pg.450]

Phosphorus oxychloride is a suitable reagent for preparation of the symmetrically substituted phospho-triesters of type (RO)3PO. The preparation is easily achieved by treatment of phosphorus oxychloride with 3 equiv. of alcohols or their metal salts. The reaction is generally promoted by a base or acid. Titanium trichloride is a particularly effective catalyst for the reaction. Conversion of POCI3 to unsymmetri-cally substituted phosphotriesters is achievable with difficulty. Phosphorochloridates and phosphorodichloridates have been used for the preparation of mixed tertiary phosphoric esters of type (ROlmPOfOROn (ffi = 1, n = 2, or m = 2, n = 1) in a very wide variety. Reaction of phosphorus oxychloride and 1 or 2 equiv. of alcohols followed by hydrolysis forms phosphomonoesters or phosphodi-esters, respectively. The hydrolysis may be generally effected by dilute aqueous alkali. Some phosphoFodichlori te intermediates are easily hydrolyzed by water. For example, the phosphorylation of a ribonucleoside (1 equation 4) with phosphorus oxychloride in an aqueous pyridine-acetonitrile mixture furnishes the nucleoside S -monophosphate (2) in excellent yield. ... [Pg.602]

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