906371-79-7Relevant articles and documents
Synthesis of imidazo[4,5-b]pyridines and imidazo[4,5-b]pyrazines by palladium catalyzed amidation of 2-chloro-3-amino-heterocycles
Rosenberg, Adam J.,Zhao, Jinbo,Clark, Daniel A.
, p. 1764 - 1767 (2012/05/20)
A facile synthesis of imidazo[4,5-b]pyridines and-pyrazines is described using a Pd-catalyzed amide coupling reaction. This reaction provides quick access to products with substitution at N1 and C2. A model system relevant to the natural product pentosidi
Efficient access to cyclic ureas via Pd-catalyzed cyclization
McLaughlin, Mark,Palucki, Michael,Davies, Ian W.
, p. 3311 - 3314 (2007/10/03)
An efficient regioselective method for the preparation of structurally diverse imidazopyridinones and benzoimidazolones starting from readily available and economical starting materials is described. High-yielding reductive alkylation of electron-deficient o-haloarylamines followed by treatment with inexpensive N-chlorosulfonyl isocyanate afforded primary ureas in good overall yields. A Pd-catalyzed urea cyclization reaction furnished imidazopyridinones and benzoimidazolones in excellent yields. Overall, the developed chemistry provides rapid access to pharmaceutically important heterocyclic compounds with high efficiency.