(3-oxoisoindolin-1-ylidine)propandinitrile derivatives and method for preparing the same
US5962658A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1998 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Sep 18, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/3612
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Derivatives of (3-oxoisoindolin-1-ylidine)propandinitrile, and a method for preparing the derivatives, are disclosed herein. The (3-oxoisoindolin-1-ylidine)propandinitrile derivatives can be prepared easily and at low cost. Also, the derivatives show good heat resistance at temperatures required for manufacturing an electro-optic device, and can minimize light loss at a near infrared light wavelength range by replacing hydrogen of the C--H bond with halogen atom. As a result, the derivatives of the present invention are useful as an optical material for an electro-optic device. In addition, the (3-oxoisoindolin-1-ylidine)propandinitrile derivatives can be used as an intermediate for synthesizing a new compound having good electro-optic characteristics and heat resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.