Hydrochloric Acid → (1r)-3-(7-Amino-1,1-dioxido-4h-1,2,4-benzothiadiazin-3-yl)-1-(3,3-dimethylbutyl)-4-hydroxy-1-methylnaphthalen-2(1h)-one hydrochloride

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Reaction Steps

A solution of Example 49F (1.91 g, 3.45 mmol) in 4 M hydrochloric acid in 1,4-dioxane (30 mL) was stirred at 25° C. for 1 hour. The solution was concentrated in vacuo and the residue was triturated in diethyl ether to give 1.58 g (93%) of the title compound. 1H NMR (300 MHz, DMSO-d6): δ ppm 0.38 (td, J=12.87, 3.68 Hz, 1H) 0.78 (m, 10H) 1.59 (s, 3H) 2.08 (m, 1H) 2.23 (td, J=12.78, 4.60 Hz, 1H) 7.07 (m, 2H) 7.53 (m, 2H) 7.77 (m, 2H) 8.16 (d, J=7.72 Hz, 1H) 13.58 (s, 1H); MS (ESI+) m/z 454 (M+H)+.

Provenance & Evidence