Trifluoroacetic acid → Methyl 4-({2-[2-(4-bromobenzyloxy)phenyl]ethylamino}methyl)benzoate

Beteiligte Stoffe

Reaktionsschritte

A solution of 4.2 g (7.57 mmol) of methyl 4-[({2-[2-(4-bromobenzyloxy)phenyl]ethyl}-tert-butoxycarbonylamino)methyl]benzoate from Example 4A in 15 ml of dichloromethane is stirred with 15 ml of trifluoroacetic acid at room temperature for 4 hours. The reaction solution is then neutralized with aqueous sodium bicarbonate solution, and the organic phase is separated off and dried over sodium sulfate. Filtration is followed by removal of the solvent in vacuo. 3.2 g (7.04 mmol, 92% yield) of a colorless oil are obtained which are employed in the next stage without further purification.

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