Photoinduoed molecular transformations. Part 146. Photoacylation and photoalkylation of 2-arylamino- and 2-alkylamino-1,4-naphthoquinones
作者:Kazuhiro Kobayashi、Masayoshi Suzuki、Hiroyasu Takeuchi、Atsushi Konishi、Hideo Sakurai、Hiroshi Suginome
DOI:10.1039/p19940001099
日期:——
2-alkylamino-1,4-naphthoquinones with aromatic or aliphatic aldehydes can be achieved in high yields when a solution of N-substituted 2-amino-1,4-naphthoquinones and an aldehyde in benzene is irradiated in the presence of benzophenone. Irradiation of 2-anilino-1,4-naphthoquinones and cyclic ethers, such as tetrahydrofuran or dioxane, in the presence of benzophenone led to analogous photoalkylation products
当N的溶液时,可以高收率地实现2-芳基氨基或2-烷基氨基-1,4-萘醌与芳族或脂族醛的光酰化。在二苯甲酮的存在下辐照被取代的2-氨基-1,4-萘醌和苯中的醛。在二苯甲酮的存在下辐照2-苯胺基-1,4-萘醌和环状醚,例如四氢呋喃或二恶烷,可高产率地产生类似的光烷基化产物3-烷基-2-苯胺基-1,4-萘醌。1,4-二羟基-2-二苯基氨基-3-丙酰基萘,其特征是双乙酸盐,可以从2-二苯基氨基-1,4-萘醌与丙醛的光酰化反应中分离得到。因此,光酰化涉及对苯二酚衍生物作为中间体。对于这些光酰化和光烷基化,提出了自由基方法,其涉及通过与激发的二苯甲酮通过夺氢从醛或环状醚形成酰基或烷基基团。