Nucleophilic displacements of N-aryl and heteroaryl groups. Part 4. Pyrylium-mediated transformations of heteroarylamines into pyridinium salts and their inter- and intra-molecular displacement
作者:Alan R. Katritzky、Bushra J. Agha、Radi Awartani、Ranjan C. Patel
DOI:10.1039/p19830002617
日期:——
idinium salts. Hydrolysis and decarboxylation afford 1-(2-pyridyl)-2,4-diphenyl- and 1-(2-pyridyl)-4-phenyl-pyridinium salts. Neither these, nor their 2,4,6-triphenyl analogues underwent smooth nucleophilic substitution.
杂芳基胺和合适的吡啶鎓盐得到1-杂芳基-2-乙氧基羰基-4,6-二苯基吡啶鎓和1-(2-吡啶基)-2,6-二乙氧基羰基-4-苯基吡啶鎓盐。水解和脱羧得到1-(2-吡啶基)-2,4-二苯基-和1-(2-吡啶基)-4-苯基-吡啶鎓盐。这些或它们的2,4,6-三苯基类似物均未进行平滑的亲核取代。