2-(2-chlorophenoxy)acetaldehyde

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 3.3 g of aminoguanidine sulphate in 30 ml. of water is added to a solution of 2.8 g. of o-chlorophenoxy acetaldehyde in 30 ml. of ethyl alcohol at 95°. Heating is effected under reflux for 4 hours, with addition of a few drops of acetic acid. After cooling, a solid product precipitates and it is separated and washed with very little water followed by ethanol. Recrystallisation is effected in the water-ethanol mixture (1/1). The o-chlorophenoxy acetaldehyde guanyl hydrazone is obtained in the form of sulphate, m.p.=198° C., with a yield of 90%. at 95° Heating After cooling a solid product precipitates it is separated washed with very little water Recrystallisation

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 3.3 g of aminoguanidine sulphate in 30 ml. of water is added to a solution of 2.8 g. of o-chlorophenoxy acetaldehyde in 30 ml. of ethyl alcohol at 95°. Heating is effected under reflux for 4 hours, with addition of a few drops of acetic acid. After cooling, a solid product precipitates and it is separated and washed with very little water followed by ethanol. Recrystallisation is effected in the water-ethanol mixture (1/1). The o-chlorophenoxy acetaldehyde guanyl hydrazone is obtained in the form of sulphate, m.p.=198° C., with a yield of 90%. at 95° Heating After cooling a solid product precipitates it is separated washed with very little water Recrystallisation