Regioselective intramolecular electrophilic substitution reactions involving π-deficient pyridine substrates: a new entry to pyridoquinazolines and benzo[h][1,6]naphthyridines
摘要:
Regioselective intramolecular electrophilic substitution reactions have been described in pi-deficient pyridine substrates tethered at C-2 to the aryl amine. The presence and nature of ring activating groups at C-6 led to the involvement of either N-1 or C-3 of the pyridine ring in the cyclization thereby leading to the regioselective synthesis of pyridoquinazolines and naphthyridines in excellent yields. (C) 2009 Elsevier Ltd. All rights reserved.
Relay Catalytic Branching Cascade: A Technique to Access Diverse Molecular Scaffolds
作者:Nitin T. Patil、Valmik S. Shinde、Balasubramanian Sridhar
DOI:10.1002/anie.201208738
日期:2013.2.18
Skeletal diversity: The reactions of alkynoic acids (A, common type of substrates) with various scaffold‐building agents (B) under gold catalysis produce a series of multifunctional polyheterocyclic structures (see scheme). The approach enables the preparation of compound libraries with high skeletal diversity.
Regioselective intramolecular electrophilic substitution reactions involving π-deficient pyridine substrates: a new entry to pyridoquinazolines and benzo[h][1,6]naphthyridines
作者:Piyush K. Agarwal、Mohammad Saifuddin、Bijoy Kundu
DOI:10.1016/j.tet.2009.11.115
日期:2010.1
Regioselective intramolecular electrophilic substitution reactions have been described in pi-deficient pyridine substrates tethered at C-2 to the aryl amine. The presence and nature of ring activating groups at C-6 led to the involvement of either N-1 or C-3 of the pyridine ring in the cyclization thereby leading to the regioselective synthesis of pyridoquinazolines and naphthyridines in excellent yields. (C) 2009 Elsevier Ltd. All rights reserved.
Catalyst-Dependent Selectivity in the Relay Catalytic Branching Cascade
作者:Avinash H. Bansode、Aslam C. Shaikh、Rahul D. Kavthe、Shridhar Thorat、Rajesh G. Gonnade、Nitin T. Patil
DOI:10.1002/chem.201405736
日期:2015.2.2
One of the best ways to access collections of small molecules is to use various techniques in diversity‐oriented synthesis (DOS). Recently, a new form of DOS, namely “relaycatalyticbranchingcascades” (RCBCs), has been introduced, wherein a common type of starting material reacts with several scaffold‐building agents (SBAs) to obtain structurally diversemolecularscaffolds under the influence of