Reagents for specific modification of biopolymers 8. Synthesis of 2,7-diaminophenazinium salts by nucleophilic substitution of hydrogen
作者:V. N. Sil'nikov、N. P. Luk'yanchuk、G. V. Shishkin
DOI:10.1007/bf01457785
日期:1996.8
Direct nucleophilic substitution in quaternary 2-N-alkylacetamidophenazinium salts with primary and secondary amines can serve as a convenient method for the introduction of two different substituents under mild conditions.
New Synthetic Approaches to Multifunctional Phenazinium Salt Derivatives
作者:Inna Garipova、Vladimir Silnikov
DOI:10.3390/80600505
日期:——
Two different approaches are offered for the synthesis under mild conditions of disubstituted phenazinium and benzo[a]phenazinium salts. Direct nucleophilic substitutions by primary and secondary amines in quaternary phenazinium salts containing an additional positive charge in the aliphatic part of the molecule were carried out. The substitution proceeds successively in positions 2 and 7, which allows