Synthesis of <i>meta</i>-Substituted Anilines via Copper-Catalyzed [1,3]-Methoxy Rearrangement
作者:Itaru Nakamura、Hiroki Tashiro、Yasuhiro Ishida、Masahiro Terada
DOI:10.1021/acs.orglett.0c01009
日期:2020.5.15
copper-catalyzed [1,3]-methoxy rearrangement of N-methoxyanilines followed by Michael addition of nucleophiles to the in situ generated ortho-quinol imine. The present reaction exhibits excellent applicability of para-substituents, such as vinyl, methylthio, ester, and bromo, and carbon nucleophiles, such as 1,3,5-trimethoxybenzene, N-methylindole, and dimethyl malonate. Thus, the present rearrangement can resolve
通过铜催化的N-甲氧基苯胺的[1,3]-甲氧基重排,然后将亲核试剂迈克尔加成到原位生成的邻苯二酚亚胺,可以高效地合成间位取代的苯胺。本反应显示出对位取代基如乙烯基,甲硫基,酯和溴的良好适用性,以及碳亲核试剂如1,3,5-三甲氧基苯,N-甲基吲哚和丙二酸二甲酯的优异适用性。因此,本发明的重排可以解决由氧化反应引起的问题,例如使用化学计量的氧化剂和吸电子基团的低相容性。