So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Ye, Peijun; Li, Qiuyun; Bai, Zhongsheng; Dong, Kun; Liu, Qiancai researched the compound: (S)-3,3′-Dibromo-1,1′-bi-2-naphthol( cas:119707-74-3 ).Synthetic Route of C20H12Br2O2.They published the article 《Chiral 9,9′-binaphtho[2,3-b]furans》 about this compound( cas:119707-74-3 ) in Heterocycles. Keywords: diiodo diacetoxybinaphthalene alkyne Sonogashira coupling cylization; binaphthofuran preparation. We’ll tell you more about this compound (cas:119707-74-3).
A series of novel difuro-fused binaphthalenes were reported. Synthetic methods include methylation, halogenation, Sonogashira coupling as well as base-mediated cyclization were employed to furnish the title compounds from chiral BINOL (R-BINOL and S-BINOL). The final products were confirmed by NMR spectra and mass spectra.
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Reference:
Bromide – Wikipedia,
bromide – Wiktionary