Reactions of<i>O</i>-methyl<i>o</i>-quinone monoximes with methyl-, methylene- and methine- substituted aromatic compounds. Synthesis of benzo[<i>d</i>]oxazole and 1,4-benzoxazine derivatives
作者:Demetrios N. Nicolaides、R. Wajih Awad、Georgios K. Papageorgiou、Efthalia Kojanni、Constantinos A. Tsoleridis
DOI:10.1002/jhet.5570340602
日期:1997.11
O-Methyl o-quinone monoxime 1 reacts thermally with compounds 2a-d or 6a,b or 7a,b to give mainly the corresponding 2-substituted phenanthroxazoles 3a-c and 8. The reaction of 1 with aromatic methylene compounds lOa-c affords the ketones 13a-c in moderate to high yields. Similar products are also obtained from the reaction of monoximes 15a,b with some of the above reactants. The unexpected products
ø -甲基ø -quinone肟1发生反应热用化合物2A-d或6A,6B或图7A,B主要得到相应的2-取代的phenanthroxazoles 3A-C和8。1与芳族亚甲基化合物10a-c的反应以中等至高收率得到酮13a-c。从一恶魔15a,b与一些上述反应物的反应中也获得了类似的产物。的意想不到的产品5和20从反应得到的1与2-甲基咪唑(2D)和苯基环氧乙烷(19),而4 H -1,4-恶嗪衍生物23是由1与茚(21)的反应获得的。