o-Quinonoid compounds. Part IV. 1,3-Diphenylinden-2-one
作者:J. M. Holland、D. W. Jones
DOI:10.1039/j39710000608
日期:——
1,3-Diphenylinden-2-one is generated by dehydration of 1-hydroxy-1,3-diphenylindan-2-one with acetic an-hydride, and by reduction of 1,3-dibromo-1,3-diphenylindan-2-one with sodium iodide. It is a reactive intermediate readily intercepted in Diels–Alder reactions with dienophiles and dienes. It dimerises below 20° by apparent [π4 +π4] addition but does not react with dienes in this way. Thermal dissociation
1,3-二苯基茚满-2-酮是通过将1-羟基-1,3-二苯基茚满-2-酮与乙酸酐脱水并通过还原1,3-二溴-1,3-二苯基茚满-2生成的。 -一个碘化钠。它是易反应的中间体,易与亲双烯体和二烯发生狄尔斯-阿尔德反应。通过明显的[ π4 + π4 ]添加,它在20°以下会发生二聚,但不会以这种方式与二烯反应。二聚体的热解离是1,3-二苯基茚满-2-一的方便来源,其与马来酸二甲酯和富马酸二甲酯立体定向反应。