Reactions of perfluoroacylchromenes with aromatic amines: synthesis of perfluoroalkylchromene carbaldehydes
作者:Dmitry V. Osipov、Irina V. Melnikova、Kirill S. Korzhenko、Vitaly A. Osyanin、Yuri N. Klimochkin
DOI:10.1007/s10593-020-02765-7
日期:2020.8
2-perfluoroacyl-1Н-benzo[f]chromenes with primary aromatic amines resulted in pyran ring cleavage, which was initiated by an aza-Michael reaction. The obtained enamino ketones underwent rearrangements in the presence of superacids, giving 2-perfluoroalkyl-4Н-chromene-3-carbaldehydes and 3-perfluoroalkyl-1Н-benzo[f]chromene-2-carbaldehydes, respectively.
的反应3-全氟-4- Н -chromenes和2-全氟-1- Н -苯并[ ˚F ]与伯芳族胺吡喃导致吡喃环切割,这是由氮杂迈克尔反应引发。将所得到的烯胺酮在超酸存在后行重排,得到2 -全氟烷基-4- Н色烯-3- carbaldehydes和3-全氟烷基1 Н -苯并[ ˚F ]色烯-2- carbaldehydes,分别。