Approach to a Substituted Heptamethine Cyanine Chain by the Ring Opening of Zincke Salts
作者:Lenka Štacková、Peter Štacko、Petr Klán
DOI:10.1021/jacs.9b02537
日期:2019.5.1
Cyaninedyes play an indispensable and central role in modern fluorescence-based biological techniques. Despite their importance and widespread use, the current synthesismethods of heptamethine chain modification are restricted to coupling reactions and nucleophilic substitution at the meso position in the chain. Herein, we report the direct transformation of Zincke salts to cyaninedyes under mild