螺[异苯并呋喃-1,9′-蒽]类化合物、制备方法及应用
By improving the structure and preparation method of spiro[isobenzofuran-1,9'-anthracene] compounds, and employing a symmetrical distribution and palladium/bident phosphine ligand catalytic system, the irreversible fading problem of existing dyes under environmental factors was solved, realizing the preparation of efficient and stable latent dyes suitable for thermal recording materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUNAN DINGYIYUAN TECH DEV CO LTD
- Filing Date
- 2026-03-30
- Publication Date
- 2026-07-17
AI Technical Summary
Existing spiro[isobenzofuran-1,9'-anthracene] compounds are prone to irreversible fading under environmental factors such as heat, light, and humidity, resulting in information loss. Furthermore, traditional synthetic processes lack universality, making it difficult to quickly develop new cryptic and explicit dyes.
The spiro[isobenzofuran-1,9′-anthracene] compound structure is adopted with a dialkylamino group linked at the 6′-position and a 3,5-dimethylphenyl group linked at the 2′-position via an -NH-bond. The catalysis is carried out in an inert gas environment using a palladium/bidentose phosphine ligand catalysis system, combining strong acid-catalyzed cyclization and CN coupling reaction under alkaline conditions.
The uniform steric hindrance distribution and synergistic enhancement of electronic effects in the colorimetric conjugated system improve the stability and reaction efficiency of the dye, extend the information retention life, and make it suitable for industrial production.
Smart Images
Figure CN122404362A_ABST