the synthesis of mono and 2,3-disubstitutedquinoxalines by using a AlCl3 induced (hetero)arylation of 2,3-dichloroquinoxaline. Both symmetrical and unsymmetrical 2,3-disubstitutedquinoxalines can be prepared conveniently by using this method under appropriate reaction conditions. The reaction proceeds via C–C bond formation and can be utilized for the preparation of a variety of quinoxaline derivatives
InCl3 mediated heteroarylation of indoles and their derivatization via C H activation strategy: Discovery of 2-(1H-indol-3-yl)-quinoxaline derivatives as a new class of PDE4B selective inhibitors for arthritis and/or multiple sclerosis
作者:Rajnikanth Sunke、Ramudu Bankala、B. Thirupataiah、E.V.V. Shivaji Ramarao、Jetta Sandeep Kumar、Hari Maduri Doss、Raghavender Medishetti、Pushkar Kulkarni、Ravi Kumar Kapavarapu、Mahaboobkhan Rasool、Jayesh Mudgal、Jessy E. Mathew、Gautham G. Shenoy、Kishore V.L. Parsa、Manojit Pal
DOI:10.1016/j.ejmech.2019.04.020
日期:2019.7
synthesized via the InCl3 mediated heteroarylation of indoles and their further derivatization through the Pd(II)-catalyzed CH activation strategy. This effort allowed us to discover a series of 2-(1H-indol-3-yl)-quinoxaline based inhibitors possessing PDE4B selectivity over PDE4D and PDE4C. One of these compounds i.e. 3b (PDE4B IC50 = 0.39 ± 0.13 μM with ∼27 and > 250 fold selectivity for PDE4B over PDE4D and