Synthesis of 1-Azaspiro[2.4]hepta-1,4,6-trienes and Azaspiroconjugation Studied by Photoelectron Spectroscopy
作者:Klaus Banert、Frank Köhler、Klaus Kowski、Barbara Meier、Beate Müller、Paul Rademacher
DOI:10.1002/1521-3765(20021115)8:22<5089::aid-chem5089>3.0.co;2-f
日期:2002.11.15
1-Azaspiro[2.4]hepta-1,4,6-trienes 3a-c have been prepared by photolysis or thermolysis of 6-azidofulvenes 5a-c, which were accessible by nucleophilic substitution reactions of the precursors 4a,b or by nucleophilic addition of hydrazoic acid to ethenylidene-cyclopentadiene (6c). The UV photoelectron spectrum of 2-methyl-1-azaspiro[2.4]hepta-1,4,6-triene (3c) has been recorded and analyzed by making
1-氮杂螺[2.4]庚-1,4,6-三烯3a-c是通过6-叠氮基富烯5a-c的光解或热解制备的,可通过前体4a,b的亲核取代反应或亲核加成来获得酸生成亚乙烯基-环戊二烯(6c)。利用密度泛函理论(DFT)B3LYP计算,记录并分析了2-甲基-1-氮杂螺[2.4]庚-1,4,6-三烯(3c)的紫外光电子光谱。已经确定了充分的共轭相互作用。2H-叠氮氮原子的孤对轨道n(N)与环戊二烯环的pi 1轨道相互作用。相对于两个母体化合物环戊二烯(7)和3-甲基-2H-叠氮基(9),这些轨道的能量分别降低或增加0.95或0.91 eV。此外,