5-硝基间苯二甲酸二甲酯 、 C.I.酸性橙108 在
crude product 、 甲醇 作用下,
以
甲醇 为溶剂,
反应 48.0h,
以MeOH 1 ml v/v) to afford 20.0 g of pure N,N′-bis(2-hydroxyethyl)-5-nitro-1,3-benzenedicarboxamide as white crystals的产率得到N,N’-bis(2-hydroxyethyl)-5-nitroisophthaldiamide
参考文献:
名称:
Aminocarboxylate ligands having substituted aromatic amide moieties
Formation of <i>N</i>,<i>O</i>-Acetals in the Production of X-ray Contrast Agents
作者:Torfinn Håland、Leiv K. Sydnes
DOI:10.1021/op500177w
日期:2014.10.17
Acetylation of 1 with acetic anhydride, an important step in the preparation of iohexol, gave the corresponding acetanilide and minor amounts of a few byproducts, whose structures have been elucidated. Among the byproducts were some 1,3-oxazolidines which survived when the reaction was quenched by adding methanol and water under strong acidic conditions.
HAAVALDSEN, J.;NORDAL, V.;KELLY, M., ACTA PHARM. SUEC., 1983, 20, N 3, 219-232