Sustainable Four-Component Annulation for the Synthesis of 2,3,4,6-Tetraarylpyridines
作者:Yuxin Ding、Renchao Ma、Xu-Qiong Xiao、Lei Wang、Zhiming Wang、Yongmin Ma
DOI:10.1021/acs.joc.0c02764
日期:2021.3.5
<i>N</i>-Silylenamines as Reactive Intermediates: Hydroamination for the Modular Synthesis of Selectively Substituted Pyridines
作者:Erica K. J. Lui、Daniel Hergesell、Laurel L. Schafer
DOI:10.1021/acs.orglett.8b02703
日期:2018.11.2
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%