Hydrochloric Acid → HCID 69751369, compound

Participants

Reaction Steps

In a flask (3R,4S)-3-benzyloxycarbonylamino-piperidine-1,4-dicarboxylic acid 1-tert-butyl ester 4-ethyl ester (1.19 g, 2.93 mmol) was dissolved in tetrahydrofuran (48 mL) and lithium hydroxide (12 mL of a 1N aqueous solution, 15 mmol) was added. The mixture was stirred for 60 hours. The reaction mixture was acidified with aqueous hydrochloric acid (3 mL of a 2M solution) and then extracted with ethyl acetate three times (30 mL). The combined organic layers were dried with magnesium sulfate, filtered, and concentrated in vacuo to give a crude white solid (1.13 g) which was used without further purification. 1H NMR (300 MHz, CDCl3), δ: 7.35 (m, 5H), 5.10 (m, 2H), 3.91, (m, 2H), 3.19 (m, 1H), 2.71 (m, 2H), 1.92 (m, 1H), 1.74 (m, 2H), 1.45 (s, 9H). MS (APCI), m+/z: (M+H)+=379.

Provenance & Evidence