Canceill, Josette; Collet, Andre published the artcile< Synthesis and optical activity of p-(-)-2,7,12-tribromo-3,8,13-trihydroxycyclotribenzylene and related compounds. Evidence for the non-orthogonality of the B2u and B1u transitions in polysubstituted benzenes and its relevance to the exciton chirality method>, COA of Formula: C8H9BrO2, the main research area is cyclotribenzylene tribromotrihydroxy preparation configuration; trimerization cyclo benzenemethanol; benzenemethanol cyclotrimerization.
Cyclotrimerization of 4,3-Br(MeO)C6H3CH2OH gave 2,7,12-tribromo-3,8,13-trimethoxycyclotribenzylene (I, R = Me) and demethylation of the latter gave triphenol (±)-I (R = H) which was resolved into enantiomers. Methylation and acetylation of (+)- or (-)-I (R = H) furnished (+)- or (-)-I (R = Me, Ac). (-)-I were assigned P-(-) absolute configuration by chem. correlation with M-(+)-cyclotrianisylene. The optical activity of I was analyzed in the light of the exciton theory. In all compounds the exptl. exciton CD pattern in the 230 nm region, the B1u transition, was opposite to that expected from the spectroscopic moments of the substituents. This unexpected behavior suggested that the angle between the polarization directions of the B2u (290 nm) and B1u (230 nm) transitions in I should significantly depart from the value, 90°, usually assumed in polysubstituted benzenes, and emphasized the risk of using the B1u transition for configurational assignments based on chiroptical methods.
Nouveau Journal de Chimie published new progress about Absolute configuration. 17100-64-0 belongs to class ethers-buliding-blocks, and the molecular formula is C8H9BrO2, COA of Formula: C8H9BrO2.
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem