Syntheses, X-ray crystal structures and reactivity of fluorenylidene- and dibenzosuberenylidene-allenes: convenient precursors to dispirotetracenes, di-indenotetracenes and 2-phenyl-11bH-dibenz[cd,h]azulene
作者:Emilie V. Banide、Crystal O'Connor、Natasha Fortune、Yannick Ortin、Sandra Milosevic、Helge Müller-Bunz、Michael J. McGlinchey
DOI:10.1039/c004868b
日期:——
which has been characterised by X-ray crystallography. Thermolysis at 180 °C yields the dispirotetracene, 15, and di-indenotetracene, 16; the latter compound forms an air-stable Diels–Alder adduct, 17, with N-methylmaleimide. In contrast, the dibenzo[a,d]cycloheptenylidene-allenes, (C14H10)CCC(Br)Ph, 20a, and (C14H10)CCC(H)Ph, 21a, do not dimerise under relatively mild conditions. However, protonation
3,3-(联苯-2,2'-二基)-1-α,α,α-三氟-对甲苯基烯丙基,9,按顺序形成头-尾,12,顺-tail -尾,13,和反式尾-尾,14,1,2- dialkylidene-环丁烷二聚体,每个都已通过X射线晶体学表征。在180°C的温度下进行热解可得到双螺环戊二烯15和双-示踪剂,16 ; 后者形成了稳定的迪尔斯-阿尔德加合物17,N-甲基马来酰亚胺。相反,二苯并[ a,d ]环庚烯-亚烯基,(C 14 H 10)C C C(Br)Ph,20a和(C 14 H 10)C C C(H)Ph,21a不二聚。在相对温和的条件下。但是,质子化溴丙二烯,20a以及随后添加的氢化物,为难以接近的碗形提供了方便的入口 二苯并[ c d,h ] ul框架,如30所示,以前没有在结构上进行过描述。其中,在X射线晶体结构12,13,14,17,20A,21A和30中报告。