HRID345996

反应详情

EQUATION

反应方程式

HRID 345996 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

3

PROCEDURE

实验过程

4 g of 2-chloro-4-(1-hydroxyl-2,2,6,6-tetramethylpiperidin-4-oxy)-6-(2,2,6,6-tetramethylpiperidin-1-yl)-1,3,5-triazine (product from Example 36) are dissolved in 30 ml of toluene, after which 2.6 g of pulverized KOH, 1 g of potassium carbonate and 0.15 g of tetrabutylammonium hydrogen sulfate are added. 1.95 g of 1-acetyl-2,2,6,6-tetramethyl-4-hydroxypiperidine are added with stirring. The mixture is warmed to 60° for 17 hours. After cooling, 30 ml of water are added. The phases are separated. The organic phase is dried over Na2SO4 and evaporated. After recrystalling from methylene chloride/hexane, dissolving the product in hexane/acetic acid and chromatographic purification on an SiO2 column, the above product, which melts at 175°-176°, is obtained.

WORKUP

后处理

  1. temperatureThe mixture is warmed to 60° for 17 hours
  2. temperatureAfter cooling
  3. customThe phases are separated
  4. dry with materialThe organic phase is dried over Na2SO4
  5. customevaporated
  6. dissolutiondissolving the product in hexane/acetic acid
  7. customchromatographic purification on an SiO2 column
  8. customthe above product, which melts at 175°-176°, is obtained