Hattori, Hideshi published the artcileSynthesis and characterization of polymerizable photochromic liquid crystals containing a spiro-oxazine group, Category: esters-buliding-blocks, the publication is Liquid Crystals (1999), 26(7), 1085-1095, database is CAplus.
Novel polymerizable photochromic liquid crystal materials containing either the 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3′-[3H]naphth[2,1-b][1,4]oxazine] group or the 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3′-[3H]pyrido[3,2-f][1,4]benzoxazine] group as the photochromic moiety, and the biphenylene unit as the mesogenic moiety, were synthesized. Thermal and phys. properties of the compounds were examined using DSC, optical polarizing microscopy, wide-angle x-ray diffractometry and UV-visible spectrophotometry. The photochromic compounds containing both photochromic and mesogenic moieties showed metastable mesophases; these tended to crystallize with time and on heating. The crystallization behaviors were strongly dependent on the structure of the terminal group of alkylene spacer and the position of the spiro-oxazine bound to the mesogen.
Liquid Crystals published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, Category: esters-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics