反应详情

A solution of 8 g (0.054 mol) of acetylene-dicarboxylic acid dimethyl ester in 25 ml of benzene is added dropwise to a solution of 8.4 g (0.05 mol) of o-chlorobenzyl azide in 50 ml of benzene that is boiling under reflux. After a further hour under reflux, the whole is diluted with 75 ml of cyclohexane and, after cooling, the substance that has crystallised out is filtered off with suction. After washing with a mixture of diethyl ether and hexane (1:1), there is obtained 1-(o-chlorobenzyl)-1H-1,2,3-triazole-4,5-dicarboxylic acid dimethyl ester having a melting point of 88°-91°.

1. temperatureunder reflux
2. temperatureAfter a further hour under reflux
3. temperatureafter cooling
4. customthe substance that has crystallised out
5. filtrationis filtered off with suction
6. washAfter washing with a mixture of diethyl ether and hexane (1:1)