CAJ | 학술논문

以负载Sn(Ⅱ)离子的离子交换树脂为催化剂合成哌啶类氮氧自由基，产率达到98%以上。催化剂易于回收，重复使用10次后，氮氧自由基产率仍达97%以上。提出了该反应的反应机理，得到的最佳工艺条件为：H2O2与4-取代- 2,2,6,6-四甲基哌啶的物质的量比为1.6∶1.0，催化剂用量为4-取代-2,2,6,6-四甲基哌啶质量的5%，反应温度70～75　℃，反应时间10 h。
이부재Sn(Ⅱ)리자적리자교환수지위최화제합성 고정류담양자유기，산솔체도98%이상。최화제역우회수，중복사용10차후，담양자유기산 솔잉체97%이상。제출료해반응적반응궤리，득도적최가공예조건위：H2O2여4-취대- 2,2,6,6-사갑기고정적물질적량비위1.6∶1.0，최화제용량위4-취대-2,2,6,6-사갑기 고정질량적5%，반응온도70～75　℃，반응시간10 h。
Piperidine sterically hindered amine free radicals were s ynthesized,catalyzed by ion-exchange resin supported Sn(Ⅱ).The yield of fr ee ra dical was more than 98%.The catalyst was prone to be recycled and after being re used 10 times,the yield of free radical was above 97% yet.The reaction mecha nism was put forward.The optimal reaction conditions obtained were:mole ratio of H2O2 to 4-substitute-2,2,6,6-tetramethylpiperidine 1.6∶1.0，amou nt of catalyst used 5%(based on the amount of 4-substitute-2,2,6,6-tetram ethylpiperidine)，reaction temperature 70～75 ℃　and reaction time 10 h.