trans-3,5-diarylimidazolidin-1-ols, while under the same conditions C-2-substituted derivatives gave the corresponding ring–chain–ring tautomers. Treatment of the crude reaction mixture from the reduction of C-2-unsubstituted imidazoline-3-oxides with a MeOH–H2O mixture provided reductive C–N bond cleavage to give hydroxylamines, while under the same conditions ring–chain–ring tautomers remained unchanged
                                    摘要用NaBH 4在THF中还原C-2-未取代的
咪唑啉-3-氧化物,得到相应的反式-3,5-二芳基
咪唑啉-1-醇,而在相同条件下,C-2-取代的衍
生物得到相应的环链–环互变异构体。通过用MeOH–H 2 O混合物还原C-2-未取代的
咪唑啉-3-氧化物来处理粗反应混合物,可提供还原性的C–N键裂解,生成
羟胺,而在相同条件下,环链环互变异构体保持不变。 图形概要