Hydrochloric Acid → HCID 58664828, compound

Participants

Reaction Steps

Compound 240 (0.40 g, 0.780 mmol) was dissolved in a mixture of methanol and THF (10 mL, 1/1, v/v). To the solution was added lithium hydroxide monohydrate (0.063 g, 1.561 mmol) dissolved in water (1 mL). The reaction mixture was stirred at room temperature for two hours, and then neutralized with 2N aqueous HCl solution to pH 5. The mixture was then concentrated under vacuum. The residue was taken into ethanol (3 mL) and the resulting solution was concentrated again under vacuum. The procedure was repeated two more times to ensure no aqueous solvent remained. The residue was chromatographed over silica gel, eluting with a mixture of concentrated ammonium hydroxide (0-10%), methanol (0-30%), and dichloromethane (100-60%), to afford the product 280 (0.29 g, 75%) as a white solid. 1H NMR (300 MHz, CD3OD): δ 1.46 (s, 9H), 1.58-1.78 (m, 8H), 2.54-2.68 (m, 4H), 2.85 (t, J=6.6 Hz, 2H), 3.98 (t, J=6.5 Hz, 1H), 7.08 (s, 4H), 8.50 (s, 1H). m/z (APCI) 365 [C20H32N2O4+H]+.

Provenance & Evidence