Hydrochloric Acid → 2-{(4-Chloro-benzyl)-[2-(7-methanesulfonylamino-1,1-dioxo-1,4-dihydro-1lambda6-benzo[1,2,4]thiadiazin-3-yl)-acetyl]-amino}-cyclopentanecarboxylic acid ethyl ester

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Reaction Conditions

Reaction Steps

(7-Methanesulfonylamino-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-3-yl)-acetic acid (prepared as described in Example 1j, 0.1665 g, 0.5 mmol) was dissolved in anhydrous N,N-dimethylformamide (3 mL). 2-(4-Chloro-benzylamino)-cyclopentanecarboxylic acid ethyl ester (0.1406 g, 0.5 mmol) was added followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.1003 g, 0.525 mmol). Then N-methylmorpholine (115 μL, 1.05 mmol) was added. The mixture was stirred at 25° C. for 5 h. The solution was poured into 1.0 M aqueous hydrochloric acid solution (100 mL). The aqueous layer was extracted with ethyl acetate (2×100 mL). The organic layer was dried over sodium sulfate and concentrated in vacuo to afford the crude product, 2-{(4-chloro-benzyl)-[2-(7-methanesulfonylamino-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-3-yl)-acetyl]-amino}-cyclopentanecarboxylic acid ethyl ester, as a yellow oil. LC-MS (ESI) calcd for C25H29ClN4O7S2 596.12, found 597.2 [M+H+].

Provenance & Evidence