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2楼2009-11-06 14:21:41
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重新修改后的文字 A solution of 1.50 g 2-Nitrosimino thiazolidin in 20 ccm n butanol was heated gently heated on 100 ° and so on, a regulated dangerous to the environment in progress remained. The N2 spin-off was finished after about 2 Stdn. Finally, was another 15 minutes under reflux. cooked. The filtrate clarified with Carboraffin became the butanol i. vak. deducted. The first oily residue crystallised in the Anreiben. 1.15 G (97 % d. th.) of well kristallisierenden, colourless Thiazolidons from Schmp 53 ° obtained after multiple Digerieren with Ethereal. Ethanol and Essigester solve very well. The connection is persistent but unsteady against alkali (ring Sprengung, positive SH response) against strong mineral acids. |
3楼2009-11-06 16:30:54