Complexation of molecular clips containing fragments of diphenylglycoluril and benzocrown ethers with paraquat and its derivatives

• Leonid S. Kikot',
• Catherine Yu. Kulygina,
• Alexander Yu. Lyapunov,
• Svetlana V. Shishkina,
• Roman I. Zubatyuk,
• Tatiana Yu. Bogaschenko and
• Tatiana I. Kirichenko

Beilstein J. Org. Chem. 2017, 13, 2056–2067, doi:10.3762/bjoc.13.203

• complexation with a variety of guests has been studied [19][20][21][22][23][24][25]. Recently, they have obtained new molecular tweezers containing a tetraphenylene group as rigid fragment and two dibenzo-24-crown-8 fragments as side arms, and their complexation with paraquat derivatives have been investigated

Synthesis of 2-substituted tetraphenylenes via transition-metal-catalyzed derivatization of tetraphenylene

• Shulei Pan,
• Hang Jiang,
• Yanghui Zhang,
• Yu Zhang and
• Dushen Chen

Beilstein J. Org. Chem. 2016, 12, 1302–1308, doi:10.3762/bjoc.12.122

• tetraphenylenes through a transition-metal-catalyzed derivatization has been developed. Three types of functionalities, including OAc, X (Cl, Br, I) and carbonyl, were introduced onto tetraphenylene, which allows the easy access to a variety of monosubstituted tetraphenylenes. These reactions could accelerate

• research on the properties and application of tetraphenylene derivatives. Keywords: acetoxylation; carbonylation; halogenation; tetraphenylene; transition metal; Introduction Tetraphenylene (1) is one of the simplest motifs in the eight-membered ring aromatic compounds (Figure 1) [1][2]. Based on its

• nonplanar distinct saddle-shaped structure [3][4], tetraphenylene and its derivatives have found broad applications in materials science [5][6][7][8][9][10][11], supramolecular chemistry [12][13][14][15][16][17][18], and asymmetric catalysis [19][20][21]. Since Rapson and co-workers reported the first

Saddle-shaped tetraphenylenes with peripheral gallic esters displaying columnar mesophases

• Eugen Wuckert,
• Constanze Hägele,
• Frank Giesselmann,
• Angelika Baro and
• Sabine Laschat

Beilstein J. Org. Chem. 2009, 5, No. 57, doi:10.3762/bjoc.5.57

• was detected. Keywords: columnar mesophases; discotic liquid crystals; tetraphenylene; Introduction Columnar liquid crystals have received increasing interest during the last decade due to their 1D charge transport and self-healing properties, which make them particularly promising candidates for

• the sterically demanding gallic esters in the periphery of the tetraphenylene can be accommodated much better by columnar packing as compared to a smectic layer structure. The results are discussed below. Results and Discussion The synthesis started from the known octamethoxytetraphenylene 1 [4][19

• ,f additional crystal to crystal transitions were detected. A typical DSC curve is shown in Figure 1. Thus tetraphenylene 2h with dodecyl chains displays a melting transition at 3 °C and a clearing transition at 36 °C upon second heating. Upon cooling an isotropic to mesophase transition at 33 °C and