(1,1-Dimethylethyl)urea
1118-12-3CC(C)(C)NC(N)=OJLEHSYHLHLHPAL-UHFFFAOYSA-N1118-12-3DTXSID0044365CHEMBL3184658化学的特性white crystals or crystalline powder
安全情報は参考情報です。供給元の安全データシート(SDS)、適用法令、専門家による評価に代わるものではありません。
tert-Butylurea is produced by treating 1 mol urea with 2 mol of tert-butanol in the presence of 2 mol of concentrated sulfuric acid at 20–25 ℃ with ice cooling.
純化方法Possible impurity is N,N'-di-tert-butyl urea which is quite insoluble in H2O. Recrystallise it from hot H2O, filter off insoluble material, and cool to 0o to -5o with stirring. Dry in vacuum at room temperature over KOH or H2SO4. If dried at higher temperatures, it sublimes slowly. It can be recrystallised from EtOH as long white needles or from 95% aqueous EtOH as plates. During melting point determination the bath temperature has to be raised rapidly as the urea sublimes slowly above 100o at 760mm. [Smith & Emerson Org Synth Coll Vol III 151 1955, Beilstein 4 IV 665.]
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