| abstract |
Process for the preparation of aryl and alkyl boron compounds of the general formula (II) and (III) by reacting aryl and alkyl magnesium halides of the general formula (I) with boron compounds in microreactors according to equation I or equation II, where X = identical or different radicals from the series fluorine, chlorine, bromine, iodine, C 1 -C 5 alkoxy, N, N-di (C 1 -C 5 alkyl) amino or (C 1 -C 5 alkyl) ) thio, Met = MgY with Y = fluorine, chlorine, bromine or iodine, n = 1, 2 or 3, and R = straight-chain or branched C 1 -C 6 -alkyl, with a radical from the group (RO, RR'N, phenyl, substituted phenyl, fluorine, RS) substituted C 1 -C 6 -alkyl, phenyl, with a radical from the group (C 1 -C 6 alkyl, C 1 -C 6 alkoxy, C 1 -C 5 thioether, silyl, fluorine, chlorine, dialkylamino, diarylamino, alkyl-arylamino) substituted phenyl or substituted or unsubstituted hetero-six-membered aryl with one or two nitrogen atoms or hetero-five-membered aryl with one or two heteroatoms from the group (N, O, S) or a substituted or unsubstituted di- to trinuclear aromatic, in temperature-controlled microreactors, the outlet channels of which, if necessary, are connected to capillaries or tubes several meters long, the reaction solutions being mixed intensively for a sufficient residence time. |