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
A highly selectivecopper-catalyzed concise synthesis of 3,5-diarylpyridine and 2-(1H)-pyridone has been achieved through cascade Chichibabin-type cyclization, C(sp3)–C(sp3) cleavage, and aerobicoxidation. Azide, ceric ammonium nitrate (CAN), and 2-aminopyridine are disclosed as efficient nitrogen donors in this Cu-catalysis using O2 as the oxidant. Water and molecular oxygen were employed as the
A metal-free decarboxylative cyclization from natural α-amino acids to construct pyridine derivatives
作者:Qiang Wang、Changfeng Wan、Yang Gu、Jintang Zhang、Lingfeng Gao、Zhiyong Wang
DOI:10.1039/c0gc00753f
日期:——
A metal-free decarboxylative cyclization from natural α-amino acids was developed and applied in the preparation of pyridinederivatives. By virtue of this method, a series of pyridines containing the moiety of natural α-amino acids can be synthesized efficiently from the corresponding natural α-amino acids.