Ringschlussreaktionen des Butadiendioxids mit Hydrazinen zu neuen Derivaten des Pyrazolidins und Piperidazins
作者:H. R. Meyer、R. Gabler
DOI:10.1002/hlca.19630460727
日期:——
The reaction of butadiene dioxide (dl-and meso-) with various hydrazines led to 1: 1-adducts having either pyrazolidine or piperidazine structures. Using N,N′-di-substituted hydrazines, pyrazolidine derivatives were obtained with yields of 70–80%, whereas hydrazine itself reacted with DL-butadiene dioxide to give about 20% of trans-4,5-dihydroxypiperidazine and a small quantity of trans-7,8-tetrah
丁二烯二氧化物(dl-和内消旋-)与各种肼的反应产生具有吡唑烷或哌啶嗪结构的1:1加合物。使用N,N'-二取代肼,可获得吡唑烷衍生物,产率为70-80%,而肼本身与DL-丁二烯反应生成约20%的反式-4,5-二羟基哌啶嗪和少量反式-7,8-四羟基-10-氮杂喹唑嗪。五环闭合反应似乎是一般的制备性有趣的吡唑烷合成。通过将5-环和6-环系统转化为开链二胺来证明其结构。这些二胺的组成是通过独立合成或转化成已知化合物来确定的。通过NMR分析分别将其他1∶1-加合物分配给吡唑烷或哌啶氮烷系列。