| abstract |
The present invention relates to a process for the preparation of triaryl organoborates from organic boronic acid esters in the presence of n-cation 1 / nKn + , and to the preparation of photopolymer blends, holographic media and holograms, To the use of the triaryl organoborates obtained above as a reagent. The claimed process comprises providing an alkyl or cycloalkylboronic ester of the formula B-R '(OR 2 ) (OR 3 ) in an aprotic solvent in the presence of a metal and adding an aryl halide to produce an organometallic compound in situ , Adding a ligand for ion exchange, and separating the prepared metal salt and solid (formula (A)). Triarylalkyl borates of formula (C) and (CC) are also claimed. |