834895-50-0Relevant academic research and scientific papers
CHROMENE COMPOUND AND CURABLE COMPOSITION
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Paragraph 0150, (2014/08/06)
A chromene compound which has a sulfur-containing substituent represented by the following formula (2) at the 6-position and/or 7-position carbon atom of an indeno(2,1-f)naphtho(1,2-b)pyran structure and is excellent in photochromic properties and stability at a high temperature. (In the above formula, ring X is an aromatic hydrocarbon ring or aromatic heterocyclic ring, R3 and R4 are each independently an alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group containing a ring member nitrogen atom and bonded to the ring X bonded thereto via the nitrogen atom, halogen atom, aryloxy group or aryl group, and "a" is an integer of 0 to 4.)
Synthesis and photochromic properties of substituted 3H-naphtho[2,1-b] pyrans
Gabbutt, Christopher D.,Heron, B. Mark,Instone, Alicia C.,Horton, Peter N.,Hursthouse, Michael B.
, p. 463 - 471 (2007/10/03)
The synthesis and spectroscopic properties of novel 3H-naphtho[2,1-b]pyrans are described. Subtle variation of the colour of the photo-generated merocyanine dyes derived from these naphthopyrans can be accomplished by controlling the steric interactions between a terminal pyrrolidine donor group and a proximal substituent.
