1217269-85-6Relevant articles and documents
[n]-Cyclo-9,9-dibutyl-2,7-fluorene (n=4, 5): Nanoring Size Influence in Carbon-Bridged Cyclo-para-phenylenes
Sicard, Lambert,Lucas, Fabien,Jeannin, Olivier,Bouit, Pierre-Antoine,Rault-Berthelot, Jo?lle,Quinton, Cassandre,Poriel, Cyril
, p. 11066 - 11072 (2020)
For the last ten years, ring-shaped π-conjugated macrocycles possessing radially directed π-orbitals have been subject to intense research. The electronic properties of these rings are deeply dependent on their size. However, most studies involve the flag
Selective and gram-scale synthesis of [8]cycloparaphenylene
Ishida, Kosuke,Kawanishi, Tatsuya,Kayahara, Eiichi,Yamago, Shigeru
, p. 2082 - 2091 (2020/03/11)
Selective and large-scale synthesis of [8]cycloparaphenylene (CPP) was achieved in seven steps starting from commercially available 4-bromo-4′-hydroxybiphenyl and 4,4′-dibromobiphenyl. The key unsymmetrical tetraring unit, 4-bromophenyl and 4′-bromobiphenyl-substituted cis-1,4-bis(triethylsiloxy)-2,5-cyclohexadiene-1,4-diyl (5fA), was synthesized on an ~50 g scale by stereoselective cis-addition of 4-bromo-4′-lithiobiphenyl to 4-(4-bromophenyl)-4-hydroxy-2,5-cyclohexadien-1-one, which was synthesized on an ~100 g scale. Platinum-mediated selective dimerization of the four-ring unit 5fB and subsequent reductive aromatization of the cyclohexadiene-diyl by H2SnCl4 gave 2 g of [8]CPP in 6.6% overall yield (10.2% on small scale).
Bending synthon, preparation method thereof and method for preparing cyclophenylene compounds
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Paragraph 0080; 0081; 0082; 0083, (2018/10/02)
The invention relates to a bending synthon, a preparation method thereof and a method for preparing cyclophenylene compounds by using the bending synthon, wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13 and X are defined as the text. The method for preparing cyclophenylene compounds by using the bending synthon is simple, and a product is high in yield, single and easy to separate,so that the method can be widely applied to the preparation of luminous cyclophenylene compounds with potential application values.