反应详情

温度

-70 °C

15.5 ml (23 mmol) of a 1.5 molar solution of n-butyl-lithium in hexane were added dropwise to a solution of 3.85 g (20 mmol) of N-(3-chlorobenzyl)-imidazole in 46 ml of absolute THF at -70° C. The mixture was stirred for 30 minutes at -70° C., after which a solution of 3.20 g (20 mmol) of 1-formyladamantane in 20 ml of absolute THF was added dropwise at -70° C. Stirring was continued for 1 hour at about -70° C. and for 2 hours at about -70° C. to room temperature, 120 ml of water were added at about 10° C., while cooling, and the suspension formed was stirred for 1.5 hours at 5°-8° C. Thereafter, the crystalline substance (crude product) was filtered off under suction and rinsed with water and hexane, and the crystalline product, dissolved in CH2Cl2, was filtered over a silica gel/CH2Cl2 column (diameter 2.0 cm, height 20 cm). The filtered solution was evaporated down in vacuo and the residue (2.36 g) was crystallized from acetone. 2.15 g (=30.1% yield) of pure 1-(1-adamantyl)-2-(3-chlorophenyl)-2-(1-imidazolyl)-ethanol of melting point 115° C. were obtained.

1. stirringStirring
2. waitwas continued for 1 hour at about -70° C. and for 2 hours at about -70° C. to room temperature
3. temperaturewhile cooling
4. customthe suspension formed
5. stirringwas stirred for 1.5 hours at 5°-8° C
6. filtrationThereafter, the crystalline substance (crude product) was filtered off under suction
7. washrinsed with water and hexane
8. dissolutionthe crystalline product, dissolved in CH2Cl2
9. filtrationwas filtered over a silica gel/CH2Cl2 column (diameter 2.0 cm, height 20 cm)
10. customThe filtered solution was evaporated down in vacuo
11. customthe residue (2.36 g) was crystallized from acetone