Herein, we report the approach to the otherwise hardly accessible dibenzoxanthenes, diarylbutanes, and calix[4]resorcinarenes possessing urea moieties based on the reaction of N-(4,4-diethoxybutyl)ureas with electron-rich aromatics in strongly acidic media. Unlike the previously developed methods, the proposed approach benefits from one-pot procedure and allows to obtain the target compounds with much higher yields.
我们在此报告了一种方法,通过将N-(4,4-二乙氧基丁基)
脲与富电子芳香族化合物在强酸性介质中反应,制备了否则难以获得的二苯并
三烯、二芳基
丁烷和含
脲基的杯[4]苯醌。与先前开发的方法不同,所提出的方法从单步操作中获益,并且可以获得目标化合物的产率大大提高。