Hydrochloric Acid → HCID 178481258, compound

Participants

Reaction Steps

2.5 g of tert-butyl (1-methyl-1-{4-[[4-(1-methyl-1H-imidazol-4-yl)phenylamino]-(2-oxobenzofuran-3-ylidene)methyl]phenyl}ethyl)carbamate (N-Boc derivative of Example 56) was dissolved in 50 mL of dioxane and combined with 50 mL of a 4N solution of hydrogen chloride in dioxane. The solution was stirred for 1 hour at RT and evaporated down. The residue was dissolved in 50 mL of methanol and evaporated down with another 150 mL of isopropanol almost to the residue and then crystallized. After diluting with acetone, the product was suction filtered and washed with acetone. Yield: 1.9 g of yellow crystals of melting point>280° C. as hydrochloride; Rf value: 0.18 (dichloromethane/methanol (8:2)).

Provenance & Evidence