90554-53-3Relevant articles and documents
N-Silylenamines as Reactive Intermediates: Hydroamination for the Modular Synthesis of Selectively Substituted Pyridines
Lui, Erica K. J.,Hergesell, Daniel,Schafer, Laurel L.
supporting information, p. 6663 - 6667 (2018/11/21)
A modular and selective synthesis of mono-, di-, tri-, tetra-, and pentasubstituted pyridines is reported. Hydroamination of alkynes with N-silylamine using a bis(amidate)bis(amido)titanium(IV) precatalyst furnishes the regioselective formation of N-silylenamines. Addition of α,β-unsaturated carbonyls to the crude mixtures followed by oxidation affords 47 examples of pyridines in yields of up to 96%. This synthetic route allows for the synthesis of diverse pyridines containing variable substitution patterns, including pharmaceutically relevant 2,4,5-trisubstituted pyridines, using this one-pot protocol.
Cross Mannich Reaction of Aldehydes; Efficient Synthesis of Substituted Pyridines
Winter, Andreas,Risch, Nikolaus
, p. 2667 - 2670 (2007/10/03)
Symmetrically and unsymmetrically substituted pyridines were obtained in highly efficient one-pot procedures starting from α-unbranched aldehydes and iminium salts.