DPT-Mediated Synthesis of 2-Aminoimidazolidin-4-ones from Thioureas Tethered to Amides
作者:Sukumar Bepary、In Kwon Youn、Hee-Jong Lim、Ge Hyeong Lee
DOI:10.1080/00397911.2013.827724
日期:2014.7.3
Abstract 2-Aminoimidazolidin-4-ones have been synthesized by using di-2-pyridyl thiocarbonate (DPT), taking the thioureastethered to amides as the starting materials. Both the primary amides and secondary amides have been subjected to this cyclization method and in general this simple and convenient method was found to ensure good to excellent yields (81–99%). GRAPHICAL ABSTRACT
Synthesis and Fluorescence Mechanism of the Aminoimidazolone Analogues of the Green Fluorescent Protein: Towards Advanced Dyes with Enhanced Stokes Shift, Quantum Yield and Two‐Photon Absorption
Intramolecularly hydrogen-bonded analogues of the greenfluorescenceprotein chromophore with an aminoimidazole moiety were synthesised and characterised. The fluorescencemechanism and substituent effects were investigated in a combined experimental-computational approach, and a 279-fold improvement in the quantumyield was realised. The novel compounds exhibit promising two-photon fluorescence for bioimaging applications