作者:Osman Cakmak、Ramazan Erenler、Ahmet Tutar、Nuray Celik
DOI:10.1021/jo051846u
日期:2006.3.1
An efficient synthesis is described for hexabromoanthracenes 3 and 4 by direct bromination of 9,10-dibromoanthrecene 2. Whereas base-induced elimination of hexabromide 3 with t-BuOK gave 2,3,9,10-tetrabromoanthracene 5, the reaction of hexabromide 4 with DBU afforded 1,3,9,10-tetrabromoanthracene 6 as the sole product. Tetrabromide 5 was also obtained by aromatization of 1,4-dinitroxy-2,3,9,10-tetrabromo-1
通过直接溴化9,10-二溴蒽2,描述了六溴蒽3和4的有效合成方法。用t -BuOK碱诱导的六溴化物3的消除得到2,3,9,10-四溴蒽5,而六溴化物4与DBU的反应得到1,3,9,10-四溴蒽6作为唯一产物。四溴化物5也可通过将1,4-二苯甲氧基-2,3,9,10-四溴-1,2,3,4-四氢蒽17芳构化而获得。描述了用于制备二壬氧基17,二甲氧基23的有效且方便的合成路线,以及由银引起的六溴化物3和4取代的二氢氧化物18和19。用甲醇钠将羟基化合物19和18分别转化为二环氧化合物20和单环氧化合物21。碱促进的二甲氧化物23的芳构化,得到二溴一甲醇盐26和27。溴蒽和异构体氧化芳烃是有价值的前体,用于制备难以通过其他途径制备的官能化取代的蒽衍生物。