Chlorosulfonic acid → HCID 135678136, compound

Participants

Reaction Steps

1.23 g (3.78 mmol) of 3-cyclopentyl-5-(4-methoxybenzyl)-isoxazolo[4,5-d]-pyrimidin-7(6H)-one (example XI) are introduced in portions into 2.51 ml of chlorosulfonic acid at 0° C. The reaction mixture is stirred at room temperature for 16 hours. It is poured onto ice water and the precipitate is filtered off with suction and dried in vacuo.

Provenance & Evidence