Uchikawa, Yuki published the artcileSynthesis and demethylation of 4,22-dimethoxy[2.10]metacyclophan-1-yne with BBr3 to afford a novel [10](2,9)-5a,11a-benzofuro-5a-bora-11-bromochromenophane, Category: bromides-buliding-blocks, the publication is Canadian Journal of Chemistry (2012), 90(5), 441-449, database is CAplus.
4,22-Dimethoxy[2.10]metacyclophan-1-yne was prepared by bromination of [2.10]metacyclophan-1-ene followed by the dehydrobromination of the bromine adduct with KOBu-t. Treatment of 4,22-Dimethoxy[2.10]metacyclophan-1-yne with BBr3 in CH2Cl2 at room temperature led to the demethylation and a successive intramol. cyclization reaction to afford a novel [10](2,9)-5a,11a-benzofuro-5a-11-bromochromenophane in good yield. Similar treatment of a mixture of the corresponding meso- and dl-1,2-dibromo-4,22-dimethoxy[2.10]metacyclophane with BBr3 in CH2Cl2 under the same conditions described above afforded cis-4b,9b-dihydro[10]benzofuro[3,2-b]benzofuranophane in 83% yield.
Canadian Journal of Chemistry published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C13H9ClN2O4, Category: bromides-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary