作者:Konrad B. Becker、Martin K. Hohermuth
DOI:10.1002/hlca.19790620632
日期:1979.9.19
Bredt olefins bicyclo [3.3.1]non-1-ene (2), bicyclo [4.2.1]non-1 (8)-ene (3), and bicyclo [4.2.1]non-1 (2)-ene (4) react rapidly with 1,3-dipoles such as diazomethane, phenyl azide, and mesitonitrile oxide to yield mixtures of two regioisomeric cycloadducts 10, 11 and 12, respectively. On the contrary, cycloaddition to the comparable monocyclic 1-methyl-(E)-cyclooctene (5) is fairly regioselective. 2
所述Bredt烯烃双环[3.3.1]壬-1-烯(2) ,双环[4.2.1]壬-1(8) -烯(3) ,和二环[4.2.1]壬-1(2) -烯(4)与1,3-偶极如重氮甲烷,叠氮化苯和均三甲氧基迅速反应,分别得到两种区域异构的环加合物10、11和12的混合物。相反,将环加成至可比的单环1-甲基-(E)-环辛烯(5)具有相当的区域选择性。2-甲基降冰片烯2-烯(6)给出了一种与均三腈氧化物的异构体(较少过滤的烯烃),但与重氮甲烷和叠氮化苯的混合物。1 H-NMR。和13核磁共振。报告了环加合物的光谱。根据前沿分子轨道理论对结果进行了讨论。