Hydrochloric Acid → (5S)-5-(acetylamino)-9,10,11-trimethoxy-6,7-dihydro-5H-dibenzo[a,c]cyclohepten-3-yl 3-[(2-aminoacetyl)amino]propanoate

Participants

Reaction Steps

A solution of (5S)-5-(acetylamino)-9,10,11-trimethoxy-6,7-dihydro-5H-dibenzo[a,c]cyclohepten-3-yl 3-[(2-tertbutoxycarbonylaminoacetyl)amino]propanoate (4) (0.36 g; 0.61 mmol) in dichloromethane (5 ml) was treated with a 4.8M solution of hydrogen chloride in ether (1 ml). The mixture was stirred at ambient temperature for 1 hour. After dilution with ether, the resulting precipitate was filtered, washed with ether and dried to give (5S)-5-(acetylamino)-9,10,11-trimethoxy-6,7-dihydro-5H-dibenzo[a,c]cyclohepten-3-yl 3-[(2-aminoacetyl)amino]propanoate.

Provenance & Evidence