Polycyclic biphenylenes. Part IV. Biphenylenes derived from 9,10-phenanthryne
作者:J. W. Barton、A. R. Grinham
DOI:10.1039/p19720000634
日期:——
10-phenanthryne (II) were obtained but the dimer of (II), tetrabenzo[a,c,g,i]biphenylene (III), was not found. ‘Crossed’ aryne couplings of (II) with benzyne and 2,3-naphthalyne gave dibenzo[a,c]- and tribenzo[a,c,h]-biphenylene; that with 1,2-naphthalyne failed. The results are discussed with regard to the stabilities of these annelated biphenylenes.
苯并[9,10- d ]三唑的胺化反应生成1-氨基-1 H-和2-氨基-2 H-衍生物[(I; R = NH 2)和(V)]的混合物,其中后者占主导地位。在用四乙酸铅氧化化合物(I; R = NH 2)中,获得了衍生自9,10菲炔(II)的产物,但(II)的二聚体是四苯并[ a,c,g,i ]联苯(III),未找到。(II)与苯炔和2,3-萘的“交叉”芳烃偶合得到二苯并[ a,c ]-和三苯并[ a,c,h]-联苯; 带有1,2-萘的化合物失效。就这些退火的联苯的稳定性讨论了结果。
Light-induced carbocyclization of iodoalkenes
作者:Esther Campos-Gómez、Pedro J. Campos、Héctor F. González、Miguel A. Rodríguez
DOI:10.1016/j.tet.2012.03.056
日期:2012.6
The direct irradiation of iodoalkenes leads to the formation of carbon-centered radical by homolysis of the C-I bond. The photoreaction is used in cyclizations with formation of six membered rings. (c) 2012 Elsevier Ltd. All rights reserved.
Bay-Region Annulative π-Extension of <i>o</i>-Iodobiphenyls with Aliphatic Anhydrides Catalyzed by Pd(OAc)<sub>2</sub>