Synthesis of symmetrical cyanine dyes with two N-ammonioalkyl groups
作者:Sergey P. Gromov、Marina V. Fomina、Alexander S. Nikiforov、Artem I. Vedernikov、Lyudmila G. Kuz'mina、Judith A.K. Howard
DOI:10.1016/j.tet.2013.05.015
日期:2013.7
Synthesis of new symmetrical mono-, tri-, and pentamethinecyaninedyes with two N-ammonioalkyl substituents was developed. In the last step of the synthesis, conditions for the removal of the phthalimide protecting group in cyaninedyes using hydrazine monohydrate and an ethanol solution of MeNH2 were selected. The obtained dyes with ammonium groups capable of hydrogen bonding are promising as components