Diels–Alder Reaction of Isobenzofurans/Cyclopentadienones with Tetrathiafulvalene: Preparation of Naphthalene, Fluoranthene, and Fluorenone Derivatives
作者:Jayachandran Karunakaran、Arasambattu K. Mohanakrishnan
DOI:10.1021/acs.orglett.7b03686
日期:2018.2.16
Diels–Alder reaction of 1,3-diarylbenzo[c]furan/cyclopentadienone with TTF followed by triflic acid mediated cleavage of the resulting adducts led to the formation of the respective 1,4-diaryl substituted naphthalenes, fluoranthenes, and fluorenones. The photophysical properties of representative diaryl-substituted hydrocarbons are also reported.
1,3-二芳基苯并[ c ]呋喃/环戊二烯酮与TTF的Diels-Alder反应,然后由三氟乙酸介导裂解所生成的加合物,从而形成各自的1,4-二芳基取代的萘,荧蒽和芴酮。还报道了代表性的二芳基取代的烃的光物理性质。
A simple and versatile acetylene equivalent in Diels–Alder reactions
作者:Perumal Raja Kumar
DOI:10.1039/c39890000509
日期:——
Allyl phenyl sulphone and cinnamyl p-tolylsulphone underwent cycloaddition with tetraphenylcyclopentadienone, indanocyclone, 1,3-diphenylisobenzofuran, and tetraphenylcyclopentadiene to give the adducts with elimination of methyl phenyl sulphone and methyl p-tolylsulphone respectively.
The unexpected product of Diels-Alder reaction between “indanocyclon” and maleimide
作者:Michał A. Dobrowolski、Piotr Roszkowski、Marta Struga、Daniel Szulczyk
DOI:10.1016/j.molstruc.2016.10.067
日期:2017.2
Abstract A heterocyclic compound commonly known as “indanocyclon” undergoes an unexpected Diels-Alder addition with maleimide. The resulting product has been isolated and characterized in order to get an information about its structure and possible mechanism of the reaction. Extensive comparison of single crystal properties of 3-(2,8-dioxo-1,3-diphenyl-2,8-dihydrocyclopenta[a]inden-8a(1H)-yl)pyrrolidine-2
Synthesis of 1,4-Diarylfluorenone and 1,4-Diarylfluorene
作者:Qiancai Liu、Yanmei Wang、Xiaoli Xiong、Shiming Deng、Jun Zhang、Min Zhu、Hangmin Ge
DOI:10.3987/com-13-12813
日期:——
A novel synthetic route to 1,4-diarylfluorenone and 1,4-diarylfluorene is presented by starting with ninhydrin. The retro-Diels-Alder cycloaddition was employed as a key step to construct the target fluorenones, while a highly efficient reduction from 1,4-diarylfluorenones to 1,4-diarylfluorenes is developed by using of sodium sulfide nonahydrate as reductant. The final products are confirmed by H-1 NMR, C-13 NMR and mass spectrometry.