Hydrochloric Acid → 3-[4-(2-Tert-butyl-1,1,3-trioxo-2,3-dihydro-1h-1lambda6-isothiazol-5-yl)-phenyl]-2-(3-trifluoromethyl-benzenesulfonylamino)-propionimidic acid ethyl ester hydrochloride

Participants

Reaction Steps

A solution of 1.37-C of Step 3 (87 mg, 0.16 mmol) in methylene chloride (5 mL) and ethanol (0.2 mL) was treated with HCl gas for 1 h. Additional methylene chloride was added during the reaction to replenish the amount which was evaporated during the bubbling of HCl. The reaction mixture was concentrated and used immediately in the next reaction.

Provenance & Evidence