The synthesis and decomposition of 3-p-nitrophenyl-3,4,5-triazatricyclo(5.2.1.02,6endo)dec-4-ene
作者:L.H. Zalkow、R.H. Hill
DOI:10.1016/0040-4020(75)80088-3
日期:1975.1
nitrate. Photolysis of endo triazoline 20 gave exclusively endo aziridine 3 (R = p-NO2C6H4), while on pyrolysis in decalin at 165–170° there was obtained endo aziridine 3, exo axiridine 2, imine 4 and a large amount of polymer. Under identical conditions, the isomeric exo triazoline 1 (R = p-NO2C6H4) gave exo aziridine 2, endo aziridine 3, imine 4 and no polymer. The “triazoline-aziridine inversion”
内三唑啉20的立体有择合成是通过将降冰片烯依次转化为3- exo - chloronorbornanone的肟,然后用乙硼烷还原其乙酸盐或对硝基苯甲酸酯得到2 - endo - amino -3- exo chloronorbornane来实现的。然后将后者与对硝基苯重氮氯化物偶合,得到重氮胺19,将重氮胺19在硝酸银存在下用乙醇乙醇钠环化。内三唑啉20的光解仅产生内氮丙啶3(R =p -NO 2 C 6 H 4),在萘烷中于165-170°进行热解时,得到内氮丙啶3,外阿昔啶2,亚胺4和大量的聚合物。在相同的条件下,同分异构的外三唑啉1(R = p -NO 2 C 6 H 4)得到外氮丙啶2,内氮丙啶3,亚胺4而且没有聚合物。推测“三唑啉-氮丙啶反转”经由重氮亚胺中间体7发生。虽然光解外切triazolines 23和24和热解的23都给,如所预期,相应的外切氮丙啶25和26,热解24个