A Cost-effective Approach for 2-(t-Butyl)-6-methyl-4H-pyrone–A Key Intermediate Toward the Synthesis of Red-emitting Dyes for OLED Applications†
✍ Scribed by Yi-Shan Yao; Yu-Tao Chuai; Xue-Song Wang; Bao-Wen Zhang
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 106 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0256-7660
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✦ Synopsis
Abstract
In the interest of driving down the cost of DCM‐type light emitting materials, we have found a new approach to prepare 2‐(t‐butyl)‐6‐methyl‐4__H__‐pyrone, which is cost effective and more amenable to large scale production than the reported method. Furthermore, three new DCM‐type dyes, N,N‐bis‐[p‐(2‐(4‐dicyanomethylene‐6‐t‐butyl‐4__H__‐ pyran‐2‐yl)‐vinyl)‐phenyl]‐4‐t‐butyl‐aniline (BDCM‐BA), N,N‐bis‐[p‐(2‐(4‐dicyanomethylene‐6‐t‐butyl‐4__H__‐pyran‐ 2‐yl)‐vinyl)‐phenyl]aniline (BDCM‐A) and N,N‐bis‐[p‐(2‐(4‐dicyanomethylene‐6‐t‐butyl‐4__H__‐pyran‐2‐yl)‐vinyl)‐ phenyl]‐4‐methoxyl‐aniline (BDCM‐MA) were synthesized in good yields using 2‐(t‐butyl)‐6‐methyl‐4__H__‐pyrone as starting material. They can be utilized in OLEDs as nondoped red emitting materials as the result of the restricted concentration quenching effect.