| 摘要 |
<p>N-(2-Hydroxyethyl) 3-methyl 2-quinoxaline carbamide 1,4-dioxide of formula (I) is made by reacting methyl acetoacetate ketimide (II) with ethanolamine, and reacting the prod. with the benzofuran (III). Reaction takes place in a solvent pref. dimethyl formamide or chloroform, and at 50-90 deg.C</p> |
