A new, direct, and efficient synthesis of benzonaphthyridin-5-ones
摘要:
Microwave-assisted Suzuki cross-coupling reaction of 2-fluorophenylboronic acid with all orthochlorocyanopyridine isomers allowed the rapid syntheses of key intermediates for anionic ring closure, which was performed using potassium hydroxide under microwave irradiation to give benzonaphthyridin-5-ones in high yields. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis of azaphenanthridines via anionic ring closure
作者:Henriette M. Hansen、Morten Lysén、Mikael Begtrup、Jesper L. Kristensen
DOI:10.1016/j.tet.2005.08.051
日期:2005.10
A new and convergent synthesis of azaphenanthridines via an anionic ringclosure is reported. Ortho-lithiation/in situ borylation of cyanopyridines produces the corresponding cyanopyridylboronic esters, which undergo a Suzuki–Miyaura cross-coupling to give the key intermediates. Addition of lithium morpholide produces the azaphenanthridines.
A new, direct, and efficient synthesis of benzonaphthyridin-5-ones
作者:Thomas Cailly、Frédéric Fabis、Sylvain Rault
DOI:10.1016/j.tet.2006.04.030
日期:2006.6
Microwave-assisted Suzuki cross-coupling reaction of 2-fluorophenylboronic acid with all orthochlorocyanopyridine isomers allowed the rapid syntheses of key intermediates for anionic ring closure, which was performed using potassium hydroxide under microwave irradiation to give benzonaphthyridin-5-ones in high yields. (c) 2006 Elsevier Ltd. All rights reserved.