Use of the Curtius Rearrangement of Acryloyl Azides in the Synthesis of 3,5-Disubstituted Pyridines: Mechanistic Studies
作者:Ta-Hsien Chuang、Yu-Chi Chen、Someshwar Pola
DOI:10.1021/jo101394c
日期:2010.10.1
A series of disubstituted pyridine derivatives was synthesized from the corresponding acryloyl azides by acetic acid-promoted cycloaddition. This represents a novel and convenient synthetic approach to the symmetric 3,5-disubstituted pyridines. The nature of the substituent on the double bond and the utilized solvent were found to be crucial to the yield of pyridines. The reactivity of the acid-promoted
Iron-Mediated One-Pot Synthesis of 3,5-Diarylpyridines from β-Nitrostyrenes
作者:Manda Sathish、Jadala Chetna、Namballa Hari Krishna、Nagula Shankaraiah、Abdullah Alarifi、Ahmed Kamal
DOI:10.1021/acs.joc.5b02712
日期:2016.3.4
An operationally simple and mild one-pot protocol for the synthesis of a variety of 3,5-diarylpyridines from β-nitrostyrenes was achieved by using elemental iron. This reaction proceeds via reduction of the nitro group, resulting in in situimine formation followed by trimolecular condensation with concomitant debenzylative aromatization. By employing this method, a series of symmetrical and unsymmetrical