Blog

Synthesis and Properties of Cycloparaphenylene-2,5-pyridylidene: A Nitrogen-Containing Carbon Nanoring

Katsuma Matsui, Yasutomo Segawa, and Kenichiro Itami

Org. Lett. 2012, ASAP. DOI: 10.1021/ol3005112

 

The first synthesis of a nitrogen-containing cycloparaphenylene, cyclo[14]paraphenylene[4]2,5-pyridylidene ([14,4]CPPy), has been achieved. A palladium-catalyzed stepwise assembly of 2,2′-bipyridine, benzene, and L-shaped cyclohexane units, followed by NaHSO4/o-chloranil-mediated aromatization, successfully provided [14,4]CPPy. While the absorption and fluorescence properties of [14,4]CPPy were somewhat similar to those of cycloparaphenylenes (λabs = 344 nm, ε = 7.3 × 104 cm–1 M–1, λem = 427 nm, ΦF = 0.80), it was found that [14,4]CPPy possesses an interesting halochromic property.

Related post

  1. An axially chiral 1,1′-biazulene…
  2. Catalytic C–H Imidation of Aroma…
  3. A Non-alternant Aromatic Belt: M…
  4. カーボンナノリング:最短のカーボンナノチューブ
  5. Dehydrogenative Synthesis of 2,2…
  6. Palladium-Catalyzed Carbon-Carbo…
  7. Stereodivergent Synthesis of Ary…
  8. Controlling the Circadian Clock …

最近の記事

Flickr@Itamilab

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!
PAGE TOP