Squaric acid → HCID 178448829, 화합물
반응식
[CH2:1]([NH:5][CH:6]1[CH2:11][C:10]([CH3:13])([CH3:12])[NH:9][C:8]([CH3:15])([CH3:14])[CH2:7]1)[CH2:2][CH2:3][CH3:4].[C:16]1(O)[C:20](=[O:21])[C:18](=O)[C:17]=1[OH:22]>C(C(CCCC)CO)C>[CH2:1]([N:5]([C+:16]1[C:17]([O-:22])=[C:18]([N:5]([CH:6]2[CH2:7][C:8]([CH3:15])([CH3:14])[NH:9][C:10]([CH3:12])([CH3:13])[CH2:11]2)[CH2:1][CH2:2][CH2:3][CH3:4])[C+:20]1[O-:21])[CH:6]1[CH2:7][C:8]([CH3:14])([CH3:15])[NH:9][C:10]([CH3:13])([CH3:12])[CH2:11]1)[CH2:2][CH2:3][CH3:4]참가 물질
4
실험 절차
Under agitation, 392.9 g (1.85 moles) of 4-n-butylamino-2,2,6,6-tetramethylpiperidine, 10.0 g (0.0877 mole) of quadratic acid, and 150 cc of 2-ethylhexanol were heated to boiling under reflux in a 1-liter agitated flask with water trap; s temperature rose from 205° to 217° C., and 2.8 cc of water was removed from the cycle. The reaction solution was then distilled. The residue was boiled with petroleum ether. After cooling, vacuum-filtering, and drying, 38.9 g was obtained (88.2% yield), mp 151°-152° C. Extinction (g/l.cm) at 278 nm: 25; at 335 nm: 83.