Potassium azide → 4-(4-Chlorobenzoyl)-3-chlorobenzyl azide

Participants

Reaction Steps

A stirred suspension of 4-(4-chlorobenzoyl)-3-chlorobenzyl bromide (1.60 g, 4.65 mmol) and potassium azide (0.715 g, 8.81 mmol) in ethanol (15 ml) was refluxed 5 hours, cooled to ambient temperature, and stirred 16 hours. The solids were filtered and washed twice with ethanol. The combined filtrate and washes were evaporated under vacuum, diluted with diethyl ether (40 ml), filtered, and evaporated under vacuum to provide 1.51 g (106% of theory) of 4-(4-chlorobenzoyl)-3-chlorobenzyl azide, m.p. 33°-33.5° C., suitable for subsequent reaction.

Provenance & Evidence