反应详情

温度

16 °C

Into a 5L reactor equipped with a nitrogen flow and an overhead stirrer was added N-hydroxysuccinimide (250.0 g, 2.172 mol) and 3-oxo-cyclobutanecarboxylic acid (248 g, 2.17 mol). Ethyl acetate (3.4 L) was added and the reaction was cooled to 16° C. A solution of 25% DCC in EtOAc (2.17 mol) was added slowly via an addition funnel to the reaction mixture over 7 minutes then the mixture was then heated at 45° C. After 2 h, the mixture was filtered and the filtrate was washed once with EtOAc (1L×1) and evaporated to dryness in vacuo to afford the desired product. 1H NMR (400 MHz, DMSO-d6) δ 2.83 (bs, 4H), 3.30-3.39 (m, 2H), 3.52-3.60 (m, 2H) and 3.67-3.73 (m, 1H).

1. temperaturethe mixture was then heated at 45° C
2. filtrationthe mixture was filtered
3. washthe filtrate was washed once with EtOAc (1L×1)
4. customevaporated to dryness in vacuo