Hydrochloric Acid → 8-(4-(Aminomethyl)phenyl)-2-morpholino-4H-chromen-4-one

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Reaction Steps

[4-(2-Morpholin-4-yl-4-oxo-4H-chromen-8-yl)-benzyl]-carbamic acid tert-butyl ester [F] (230 mg, 0.53 mmol), in dichloromethane (5 ml) was treated with 4M hydrogen chloride in dioxane (2 ml). The reaction was stirred at room temperature for 3 hours during which time a precipitate forms. The solvent was removed in vacuo and the residue triturated with ether. The resulting solid was collected by filtration and dried to give 8-(4-aminomethyl-phenyl)-2-morpholin-4-yl-chromen-4-one [G]. Yield 189 mg, quantitative.

Provenance & Evidence