Novel versatile imine—enamine chemosensor based on 6-nitro-4-oxo-4H-chromene for ion detection in solution, solid and gas-phase: synthesis, emission, computational and MALDI-TOF-MS studies

Synthesis of 3‐aminomethylidenechroman‐2‐carboxamides by a Sequential One‐pot Three Component Reaction and by Post‐Passerini Condensation Modification

“…A mixture of 7 (1 mmol) and m ‐xylylenediamine ( 14 ) (0.5 mmol) was heated under reflux in ethanol for 8 h. After usual work‐up and chromatographic separation over silica gel (100–200 mesh) using 40% ethyl acetate in benzene as eluent, the reaction mixture produced 15 (~40%) (Scheme ). Compound 15 has some resemblance with a chromone‐based chemosensor .…”

Synthesis and Chemical Reactivity of 4‐Oxo‐4H‐1‐benzopyran‐3‐carboxaldehyde

“…4‐Oxo‐4 H ‐1‐benzopyran‐3‐carboxaldehyde 1 and 1,5‐bis(2‐aminophenoxy)‐3‐oxapenthane 36 underwent a condensation reaction in ethanol under boiling for 4 h or under ultrasound irradiation for 1.5 h to afford an unstable Schiff base 37 in which a water molecule readily added to form an enamine like structure 38 . The compound 38 is a good metal‐sensor and response to various metal ions such as Cu 2+ , Zn 2+ , Cd 2+ , Hg 2+ , and Ag + over Li + , Na + , K + , Ca 2+ , Co 2+ , and Ni 2+ (Scheme ).…”

Spectroscopic and photophysical studies of a naphthalene-based emissive probe for metal cations

“…Following our research interest on the design of new emissive compounds [20,[24][25][26][27] and metal complexes [28][29][30], in this work, the photophysical properties of another symmetric probe L, with two naphthalene units in the extreme as well, was described together with its ) were mixed in absolute ethanol. After 4h, the solvent was partially removed to ca.…”