Water → Benzyl 3-oxopiperazine-1-carboxylate

関与物質

反応手順

To a magnetically stirred solution of piperazin-2-one (2.0 g, 20.0 mmol) in THF (10 mL) at room temperature under Ar atmosphere, K2CO3 (8.25 g, 120 mmol), water (10 mL), and benzyl chloroformate (3.14 mL, 22.0 mmol) were added. The reaction mixture was stirred for 18 hours at room temperature. Water (50 mL) was added, and the aqueous phase was extracted with EtOAc (2×100 mL). The combined organic layers were washed with water, dried with MgSO4, and concentrated in vacuo to the give the title compound (6.84 g, 100%). 1H NMR (400 MHz, CDCl3) δ 3.37 (bs, 2H), 3.68 (t, J=4.7 Hz, 2H), 4.13 (s, 2H), 5.14 (s, 2H), 7.34 (m, 5H).

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