159595-96-7Relevant academic research and scientific papers
Synthesis and Photochromism of Novel Pyridyl-Substituted Naphthopyrans
De Azevedo, Orlando D. C. C.,Elliott, Paul I. P.,Gabbutt, Christopher D.,Heron, B. Mark,Lord, Kyle J.,Pullen, Christopher
, p. 10772 - 10796 (2020/09/23)
Multitarget synthetic strategies to access novel photochromic 3H-naphtho[2,1-b]pyrans decorated with pyridyl units are described. The new pyridyl-substituted 3H-naphtho[2,1-b]pyrans display good photochromic properties with reversible generation of photomerocyanines, which exhibit mainly orange/red hues. Photochromic parameters including photocolorability and persistence of color vary tremendously on structural modification of the naphthopyran core.
PYRANO-QUINOLINES, PYRANO-QUINOLINONES, COMBINATIONS THEREOF, PHOTOCHROMIC COMPOSITIONS AND ARTICLES
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Page/Page column 46, (2010/02/12)
Described are compositions of at least one material represented by a pyrano[3,2-c]quinoline structure, a pyrano[3,2-c]quinolinone structure or mixtures thereof. The pyrano[3,2-c]quinoline structure is characterized by having a nitrogen atom at the 6-position ring atom and an oxy-substituent at the 5-position ring atom. The pyrano[3,2-c]quinolinone structure is characterized by having a substituted nitrogen atom at the 6-position ring atom and an oxo-substituent at the 5-position ring atom, the nitrogen atom substituents being hydrogen, aliphatic substituents, cycloaliphatic substituents, aromatic substituents, heteroaromatic substituents or a combination thereof. Both of the pyrano[3,2-c]quinoline and pyrano[3,2-c]quinolinone structures are characterized by having two substituents at the 2-position ring atom, each substituent being independently chosen from aliphatic substituents, cycloaliphatic substituents, aromatic substituents, heteroaromatic substituents or a combination thereof, provided that both substituents at the 2-position are not aliphatic. Alternatively, the two substituents at the 2-position can combine to form a spirocyclic group, provided that the spirocyclic group is not norbornylidene or bicyclo[3.3.1]9-nonylidene. The ring atoms have been numbered according to the International Union of Pure and Applied Chemistry rules of nomenclature starting with the 1-position ring atom being the oxygen atom of the pyran ring and numbering counterclockwise therefrom. Also described are photochromic articles that contain or that have coatings or films containing at least one of the novel compositions or combinations thereof with other photochromic materials.
