I found the field of Chemistry very interesting. Saw the article Selective and Gram-Scale Synthesis of [8]Cycloparaphenylene published in 2020. Name: 4,4′-Dibromobiphenyl, Reprint Addresses Kayahara, E; Yamago, S (corresponding author), Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan.. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl
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 similar to 50 g scale by stereoselective cis-addition of 4-bromo-4′-lithiobiphenyl to 4-(4-bromophenyl)-4-hydroxy-2,5-cyclohexadienl-one, which was synthesized on an similar to 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).
Bye, fridends, I hope you can learn more about C12H8Br2, If you have any questions, you can browse other blog as well. See you lster.. Name: 4,4′-Dibromobiphenyl
Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem