Process for the synthesis of 4-substituted N-[(alk-2-en-1-yl)oxy]-and N-aralkyloxy-2,2,6,6-tetraalkylpiperidines
    1.
    发明授权
    Process for the synthesis of 4-substituted N-[(alk-2-en-1-yl)oxy]-and N-aralkyloxy-2,2,6,6-tetraalkylpiperidines 失效
    合成4-取代的N - [(烷-2-烯-1-基)氧基]和N-芳烷氧基-2,2,6,6-四烷基哌啶的方法

    公开(公告)号:US06211378B1

    公开(公告)日:2001-04-03

    申请号:US09315705

    申请日:1999-05-20

    IPC分类号: C07D21136

    CPC分类号: C07D211/94

    摘要: An environmentally friendly process for the preparation of the 4-functionalized N—OR derivatives of 2,2,6,6-tetraalkylpiperidines involves the hydrogen peroxide of the corresponding N—H compound to form the corresponding N-oxyl derivative, reacting two equivalents of the N-oxyl compound with one equivalent of a compound having an allylic hydrogen, a benzylic hydrogen or an activated methine hydrogen to form one equivalent of the corresponding N—OH compound and one equivalent of the corresponding N—OR compound, and recycling the N—OH compound back to the corresponding N-oxyl compound using hydrogen peroxide or air.

    摘要翻译: 用于制备2,2,6,6-四烷基哌啶的4-官能化N-OR衍生物的环保方法涉及相应的NH化合物的过氧化氢以形成相应的N-氧基衍生物,使两当量的N 氧化合物与1当量的具有烯丙基氢,苄基氢或活化次甲基氢的化合物形成1当量的相应的N-OH化合物和1当量的相应的N-OR化合物,并再循环N-OH 使用过氧化氢或空气将其复合回相应的N-氧基化合物。