摘要:
The novel two-stage process described here makes it possible to obtain substituted benzyl compounds and toluene derivatives in a simple manner and in high yields by means of Suzuki-type coupling reactions of an aromatic with an organoboron compound, followed by a reduction. The process is particularly useful for preparing ortho-substituted benzyl compounds and toluene derivatives. The process can be applied to both intermolecular and intramolecular coupling reactions. Catalysts used for the coupling reaction are palladium compounds and/or nickel compounds. An advantageous aspect is that only very small amounts of catalyst are required.
摘要:
A process for preparing 4-substituted 2-alkylbiphenyls and 2-alkoxybiphenyls of the formula (I), 1 by reaction of phenylboronic acids of the formula (II) with 4-bromo- or 4-iodo-alkyl- or -alkoxy-anilines or -anilides of the formula (III) to form compounds of the formula (IV), 2 if appropriate subsequent deacylation to form (V) and subsequent diazotization to form compounds of the formula (VI) and reaction with a nucleophile X, a Cu salt by the Sandmeyer reaction or a reducing agent to give 4-substituted 2-alkylbiphenyls and 2-alkoxybiphenyls of the formula (I). 3