338989-45-0Relevant articles and documents
Synthesis of enantiopure angularly condensed [2.2]paracyclophanes containing five-membered rings
Minuti, Lucio,Taticchi, Aldo,Marrocchi, Assunta,Lanari, Daniela,Broggi, Alessandra,Gacs-Baitz, Eszter
, p. 481 - 487 (2003)
Optically active angularly condensed [2.2]paracyclophanes containing five-membered rings have been synthesized by a two-step approach based on the Diels-Alder cycloaddition of (S)-(+)-4-vinyl[2.2]paracyclophane. Structural analysis by NMR spectroscopy is presented. These helicenophanes containing a cyclopentane ring show extraordinarily high specific rotations. This phenomenon has been discussed in terms of structural modifications caused by the replacement of the benzene unit with a cyclopentane ring.
Synthesis of benzo[c]fluorenone through a one-pot cascade reaction using inden-1-one derivatives
Zheng, Shuyan,Tan, Hongsheng,Zhang, Xiaoguang,Yu, Chunhui,Shen, Zhengwu
supporting information, p. 975 - 978 (2015/02/02)
A novel one-pot thermal cycloaddition of two indenones followed by a decarbonylation and dehydrogenation cascade afforded benzo[c]fluorenones regioselectively. Various substituted indenone derivatives were converted into their corresponding benzo[c]fluorenones in good to excellent yields.