作者:Alwyn Spencer
DOI:10.1016/0022-328x(85)88075-x
日期:1985.11
an atmosphere of carbon monoxide catalyses the reaction of azobenzene derivatives and primary alcohols or their esters to give 2-substituted 1-phenylbenzimidazoles. Substituents in the azobenzene derivatives have a marked effect on the product yields. Where isomer formation can occur, all possible isomers of the product are usually formed. In non-symmetrically substituted azobenzene derivatives, ortho-metallation
在PPh 3和催化量的碱的存在下,在一氧化碳气氛下,RuCl 3 ·3H 2 O催化偶氮苯衍生物与伯醇或其酯的反应,得到2-取代的1-苯基苯并咪唑。偶氮苯衍生物中的取代物对产物收率有显着影响。在可能发生异构体形成的地方,通常会形成产物的所有可能的异构体。在非对称取代的偶氮苯衍生物中,邻金属化优先发生在具有最高电子密度的芳环中。