[9]Cycloparaphenylene: Nickel-Mediated Synthesis and Crystal Structure

Yasutomo Segawa, Petr Šenel, Sanae Matsuura, Haruka Omachi, and Kenichiro Itami

Chem. Lett. 2011, 40, 423–425. DOI: 10.1246/cl.2011.423 Selected as “Editor’s Choice”


Nickel-mediated synthesis of [9]cycloparaphenylene ([9]CPP) is described. L-shaped diphenylcyclohexane monomers underwent cyclotrimerization under the influence of Ni(cod)2/bipy. X-ray crystal structure analysis and VT NMR analysis of the thus-formed cyclic trimer confirmed its triangle structure and interesting cyclohexane-flipping behavior in solution. Cyclic trimer was converted to [9]CPP by acid-mediated aromatization. The first X-ray crystal structure of [9]CPP is also mentioned.


Related post

  1. Photoredox‐Catalyzed Decarboxyla…
  2. One-shot Indole-to-Carbazole π-E…
  3. Cu-Catalyzed aromatic C–H imidat…
  4. Palladium-Catalyzed Esterificati…
  5. Perfluorocycloparaphenylenes
  6. Thiophene-Based, Radial π-Conjug…
  7. C–H Functionalization of Azines
  8. Size-selective synthesis of [9]-…

Twitter@Itami Lab

Itami Lab Facebook

Instagram@Itami Lab



天池先輩からコーヒースープ伴夫妻からのお歳暮です!潤さん、宮村さん、ありがとうございます!!武藤さん、ビールありがとうございます!平賀大都わーいやなさん、あつしさん、ありがとうございます!!だいぶ前だけど、Stripes look #ootdHalloween lookラインを洗う時ですら格好良く。戸谷先生教育実習!imageけいしゅう、誕生日おめでとう!誕生日は英吉家!!3年生に名古屋ぼろ勝ちアピール中!!アリシア卒業おめでとう女子会!