| 摘要 |
FIELD: chemical technology, agriculture. SUBSTANCE: product having formula(where R is unsubstituted or substituted alkyl, aralkyl or cycloalkyl) is prepared by interaction with metal aluminium, phosphoric acid, phosphotrichlorides, and suitable alcohol at their molar ratio 1:2:1: ≥3, respectively. The process is carried out in organic solvent (e.g. dioxane, toluene). Phosphotrichloride is added into mixture of solvent, aluminium and phosphoric acid. Then suitable alcohol is slowly added, its quantity being stoichiometric or more. Temperature of reaction mass is up to 60-80 C. To complete reaction and to remove hydrogen chloride reaction mixture is boiled. Desired product is isolated practically quantitatively after removing solvent. EFFECT: improved quality of desired product. |
