MeOH tetrahydrofuran → HCID 178451969, compound

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Reaction Steps

A mixture of 4-(6-benzenesulfonyl-2-methyl-6H-1,2,3,5,6-pentaaza-as-indacen-1-yl)-4-methyl-piperidine-1-carboxylic acid tert-butyl ester (0.37 g, 0.75 mmol) in THF/methanol containing aqueous sodium hydroxide (3.75 mmol) was stirred for 16 hours. The solvent was evaporated under vacuum to a small volume, the residue dissolved in DCM, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate and concentrated under vacuum to afford 240 mg (90%) of 4-methyl-4-(6H-1,2,3,5,6-pentaaza-as-indacen-1-yl)-piperidine-1-carboxylic acid tert butyl ester. LCMS (Method I, ESI): RT=3.20 min, m+H=357.3; 1H NMR (400 MHz, DMSO) δ: 12.46 (s, 1H), 9.06 (s, 1H), 7.63 (t, 1H), 6.86 (m, 1H), 3.62 (m, 2H), 3.33 (m, 2H), 2.71 (m, 2H), 2.12 (m, 2H), 1.85 (s, 3H), 1.43 (s, 9H).

Provenance & Evidence