A variety of novel triarylmethanes including bis-(dihexyloxyphenyl)arylmethanes and diveratrylmethanes were prepared by the domino Friedel–Crafts alkylation of arenes with aldehydes catalysed by Bi(OTf)3. The reaction of veratrole with aromatic dialdehydes afforded different results based on the molar ratio of reactants and the nature of aromatic dialdehydes. Bi(OTf)3/O2 is shown to be a highly efficient
通过Bi(OTf)3催化的醛的多米诺骨牌Friedel-Crafts烷基化反应,制备了多种新型的三芳基
甲烷,包括双-(二己基氧基苯基)芳基
甲烷和双戊基
甲烷。基于反应物的摩尔比和芳族二醛的性质,Veratrole与芳族二醛的反应提供了不同的结果。Bi(OTf)3 / O 2被证明是一种高效的试剂体系,可促进酰基与双的串联三步反应-(二己氧基氧基苯基)芳基
甲烷或三戊基
甲烷,用于制备9,10-二取代的2,3,6,7-四烷氧基
蒽。底物范围,反应和后处理过程的简单性,以及产率和反应时间的显着提高,是这些方法的宝贵优势,它们代表了多取代
蒽的一条新的有力途径。