Hydrochloric Acid → (+/-)-4-Oxo-2-pyridin-4-yl-9-[(1,2,3,4-tetrahydro-isoquinoline-7-carbonyl)-amino]-5,6,8,9-tetrahydro-4H-1,4a,7-triaza-benzocycloheptene-7-carboxylic acid ethyl ester

Participants

Reaction Steps

To a solution of 0.0265 g (0. mmol) of (+/−)-9-[(2-tert-butoxycarbonyl-1,2,3,4-tetrahydro-isoquinoline-7-carbonyl)-amino]-4-oxo-2-pyridin-4-yl-5,6,8,9-tetrahydro-4H-1,4a,7-triaza-benzocycloheptene-7-carboxylic acid ethyl ester (example 5) dissolved in 1 mL of dichloromethane was added 1.13 mL (4.50 mmol) of hydrochloric acid (4M in dioxane). The resulting mixture was stirred at room temperature for 16 hours. The resulting residue was filtered, washed with dichloromethane and isopropylether to afford 0.261 g (100%) of the pure product as a white powder.

Provenance & Evidence