Synthesis and Photochromism of Novel Pyridyl-Substituted Naphthopyrans.
Orlando D C C de AzevedoPaul I P ElliottChristopher D GabbuttB Mark HeronKyle J LordChristopher PullenPublished in: The Journal of organic chemistry (2020)
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.