Benzoquinoline derivatives were successfully synthesized by iridium-catalyzed N-heterocyclization of naphthylamines with diols. For instance, the reaction of 1-naphthylamine with 1,3-propanediol catalyzed by IrCl3 combined with BINAP as a ligand produced 7,8-benzoquinoline in quantitative yield. The N-heterocyclization reaction was found to be markedly influenced by the ligands employed. Benzoindoles were also synthesized by the same strategy from napthylamines with 1,2-diols. A reaction mechanism for the N-heterocyclization of naphthylamines with 1,3-diols by IrCl3 was proposed.
机构:
Kansai Univ, Dept Chem & Mat Engn, Fac Chem Mat & Bioengn, Osaka 5678680, JapanKansai Univ, Dept Chem & Mat Engn, Fac Chem Mat & Bioengn, Osaka 5678680, Japan
Obora, Yasushi
Ishii, Yasutaka
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机构:Kansai Univ, Dept Chem & Mat Engn, Fac Chem Mat & Bioengn, Osaka 5678680, Japan