反应详情

A solution of N-hydroxysuccinimide (6.18 g, 0.0537 mol) and trans-4-(methoxycarbonyl)cyclohexanecarboxylic acid (10.00 g, 0.05370 mol) in THF (100.00 mL) was charged with (N,N′-dicyclohexylcarbodiimide (11.08 g, 0.0537 mol) in THF (16 mL). This reaction was stirred at rt for an additional 16 h then stirred at 45° C. for 1 h. The reaction mixture was filtered while still warm through a flitted funnel. The cake was washed with 3 more portions of THF and the filtrate was concentrated in vacuo and was crystallized from i-PrOH (300 mL) and filtered through a flitted funnel resulting in 11.8 g, (78% yield) of the title compound as a white crystals. 1H NMR (400 MHz, CDCl3) δ ppm 1.45-1.69 (m, 4H), 2.07-2.16 (m, 2H), 2.18-2.28 (m, 2H), 2.29-2.39 (m, 1H), 2.59-2.71 (m, 1H) 2.84 (br. s., 4H) and 3.68 (s, 3H); MS (ES+): m/z 284.09 [MH+].

1. stirringthen stirred at 45° C. for 1 h
2. filtrationThe reaction mixture was filtered
3. temperaturewhile still warm through a flitted funnel
4. washThe cake was washed with 3 more portions of THF
5. concentrationthe filtrate was concentrated in vacuo
6. customwas crystallized from i-PrOH (300 mL)
7. filtrationfiltered through a flitted funnel