differentiation of protein aggregates post-mortem would be advantageous for the insight into the properties of tau protein aggregates. We chose to design new molecularprobes based on the structure of 2-(1-(6-((2-[18F]fluoroethyl)(methyl)amino)-2-naphthyl)ethylidene)malononitrile to investigate their likelihood of fitting into VQIVYK tau protein binding channel model. In a modular approach, using cross-coupling
utilized in various fluorescence imaging techniques. However, many existing modification strategies could not balance the performance (such as brightness, photostability, water solubility, and permeability) of fluorophores. Herein we report a general strategy to enhance the performance of donor–acceptor-type fluorophores by introducing azetidine-containing heterospirocycles to the commonly used fluorophore
In this work, we report the synthesis, X-ray structures, and optical properties of two DDNP analogs containing an unsaturated spacer inserted between the donor N,N-dimethylamino group and the naphthalene ring. The new compounds have longer distances between the donor and acceptor groups and are intended to serve as molecular probes for the assessment of spatial and polarity requirements for binding to protein aggregates found in the central nervous system (CNS) of patients with neurodegenerative diseases. (C) 2014 Elsevier Ltd. All rights reserved.