A number of N-phenyl-1,4-naphthoquinone monoimines 6–10 were prepared by on-water oxidative phenylamination of 1,5-dihydroxynaphthalene (1) and 5-acetylamino-1-hydroxynaphthalene (5) with oxygen-substituted phenylamines under aerobic conditions and either solar or green LED radiation, in the presence of rose bengal as singlet oxygen sensitizer. As compared to the conventional oxidative phenylamination procedures, this novel synthetic method offers the advantage of aerobic conditions “on water” instead of hazardous oxidant reagents currently employed in aqueous alcoholic media.
一些N-苯基-
1,4-萘醌单
亚胺化合物6-10通过在
水中氧化
苯胺基化
1,5-二羟基萘(
1)和5-乙酰
氨基-1-羟基
萘(
5),在有玫瑰孟津作为单线态氧敏化剂的条件下,在氧代
苯胺的存在下,通过太阳能或绿色LED辐射制备而成。与传统的氧化
苯胺基化方法相比,这种新颖的合成方法具有在
水中的
氧气条件的优势,而不是在含有危险氧化剂的
酒精介质中使用。