反应详情

温度

110 °C

20.3 g (147 mmol) of triethylamine hydrochloride and 21.0 g (322 mmol) of sodium azide are added to a solution of 14.0 g (107 mmol) of 2-cyano-benzaldehyde in 350 ml of 1-methyl-2-pyrrolidone and heated at 110° C. for 3 hours (argon atmosphere). The black reaction solution is poured into 0.6 liter of ice/37% HCl (20:1) and stirred thoroughly to complete the reaction. Extraction with 3 portions of ethyl acetate, washing the organic phases with 3× water and brine, drying (Na2SO4), concentration by evaporation and stirring in diethyl ether yield 2-(tetrazol-5-yl)-benzaldehyde; m.p. 130° C.; TLC: Rf=0.10 (CHCl3/methano/H2O/acetic acid=85:13:1.5:0.5).

1. customthe reaction
2. extractionExtraction with 3 portions of ethyl acetate
3. washwashing the organic phases with 3× water and brine
4. customdrying
5. concentration(Na2SO4), concentration
6. customby evaporation
7. stirringstirring in diethyl ether