N'-Hydroxybenzenecarboximidamide → HCID 67300490, compound

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Reaction Steps

Add benzamidoxime (5.63 g, 41.36 mmol) to a 1M solution of potassium t-butoxide (31 mL, 31 mmol) in tetrahydrofuran and anhydrous tetrahydrofuran (442 mL). Add methyl 2-oxopiperidine-4-carboxylate (5 g, 31.8 mmol) and stir overnight at room temperature. Pour reaction over saturated aqueous sodium bicarbonate and extract into chloroform. Separate layers and extract the aqueous phase with additional chloroform. Dry the combined organic layers over anhydrous magnesium sulfate, filter, and concentrate to dryness under reduced pressure. Purify the resulting residue by flash chromatography (silica gel), eluting with 1-5% 7 N ammoniated methanol in dichloromethane to afford the title compound (4.15 g). 1H NMR (CDCl3) δ 2.19 (m, 1H), 2.34 (m, 1H), 2.8-2.95 (m, 2H), 3.44-3.52 (m, 2H), 3.57 (m, 1H), 6.13 (bs, 1H), 7.45-7.54 (m, 3H), 8.0-8.11 (m, 2H).

Provenance & Evidence