A novel acid-catalyzed rearrangement of 9,10-diaryl-9,10-dihydroanthracene-9,10-diols affording 10,10′-diaryl-9-anthrones
作者:Mario Smet、Joachim Van Dijk、Wim Dehaen
DOI:10.1016/s0040-4020(99)00406-8
日期:1999.6
substituents are present on the anthracene residue, high amounts of anthrones are formed. These anthrones can be considered to result from a vinylogous pinacol rearrangement of the initial diol. To the best of our knowledge, this type of rearrangement is rarely observed, and the 10,10′-diaryl-9-anthrones obtained in this way, are difficult to prepare otherwise. We prepared a number of such compounds and
通常,可以通过在乙酸中用KI / NaH 2 PO 2还原相应的9,10-二芳基-9,10-二氢蒽-9,10-二醇来获得9,10-二芳基蒽。相反,我们发现,在杂芳基芳基取代基的情况下,并且当蒽取代基上存在per取代基时,会形成大量的蒽酮。可以认为这些蒽酮是由最初的二醇的频哪醇重新排列而产生的。据我们所知,这种类型的重排很少观察到,并且以这种方式获得的10,10'-二芳基-9-蒽酮很难用其他方法制备。我们制备了许多此类化合物,并研究了涉及的转化机理。结果与桥接过渡状态一致10。