五元和六元环状乙烯基叠氮化物1(3-叠氮基-2-甲基-环戊烯-1-酮)和2(3-叠氮基-2-甲基-2-环己烯-1-酮)的光反应性分别在低温下通过电子顺磁共振(EPR),红外和紫外光谱对环进行了表征。EPR光谱表明,在10 K下于2-甲基四氢呋喃中辐照(λ> 250 nm)乙烯基叠氮化物1和2导致相应的三重态乙烯基氮化物3 1N(D / hc = 0.611 cm –1和E / hc = 0.011 cm –1)和3 2N(D / hc = 0.607 cm –1和E / hc = 0.006 cm –1),它们在低温下是热稳定的。在氩气基质中辐照乙烯基叠氮化物1(在12 K时为310 nm发光二极管)和2(在8 K时通过310-350 nm滤光片通过氙弧灯)表明,与系统间交叉竞争形成了乙烯基氮化物3 1N和3在图2N中,叠氮化乙烯基1形成少量的酮亚胺3,而叠氮化乙烯基2形成大量的叠氮胺7。
Rearrangement in Dihydroresorcinol Derivatives. XI. Photolysis and Thermolysis of 3-Azido-2-cyclohexen-1-ones and 2-Cyclopenten-1-ones
作者:YASUMITSU TAMURA、SHOICHI KATO、YOSHINOBU YOSHIMURA、TADASHI NISHIMURA、YASUYUKI KITA
DOI:10.1248/cpb.22.1291
日期:——
Both photolysis and thermolysis of 2-alkylsubstituted 3-azido-2-cyclohexen-1-ones and -2-cyclopenten-1-ones in methanol gave mainly the α-aminoketal derivatives, although the corresponding 2-unsubstituted compounds gave the Curtius-type rearrangement products.