Synthesis of Heterocyclic Compounds via Nucleophilic Aroylation Catalyzed by Imidazolidenyl Carbene
作者:Yumiko Suzuki、Tomonori Toyota、Akira Miyashita、Masayuki Sato
DOI:10.1248/cpb.54.1653
日期:——
Xanthones and acridones were synthesized from 3,4-difluoronitrobenzene and 2-fluorobenzaldehydes in two or three steps. The key step was nucleophilic aroylation catalyzed by imidazolidenyl carbene. The nucleophilic aroylation of 3,4-difluoronitrobenzene afforded 2,2'-difluoro-4-nitrobenzophenones. The cyclization of the difluorobenzophenones with O-nucleophile and N-nucleophile yielded 3-nitroxanthones