Chlorosulfonic acid → HCID 136115483, compound

Participants

Reaction Steps

The preparation is carried out analogously to the procedure of Example 27A using 300 mg (0.81 mmol) of 2-(2-ethoxyphenyl)-5-methyl-7-(2-n-propylbutyl)-3H-imidazo[5,1-f][1,2,4]-triazin-4-one (Example 25A) and 950 mg. (8.1 mmol) of chlorosulphuric acid. This gives 300 g (78.9%) of sulphonyl chloride which is directly reacted further.

Provenance & Evidence