Heterocyclic compounds and optical recording materials
US7683184B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2005 |
| Grant date | Mar 23, 2010 |
| Priority date | — |
| Expiry date | Sep 24, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/2535
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The heterocyclic compound of the present invention is represented by general formula (I) and is suitable to forming an optical recording layer in an optical recording medium to which short-wavelength light is applied for recording and playing-back.(In the formula, ring A represents a benzene or naphthalene ring optionally substituted with an alkyl, haloalkyl, alkoxy, haloalkoxy or amido group having 1 to 8 carbon atoms, a halogen atom, a cyano group, a nitro group, a sulfonyl or sulfinyl group containing a hydrocarbon group having 1 to 12 carbon atoms, or an alkylamino or dialkylamino group wherein each alkyl has 1 to 8 carbon atoms; X represents CRaRb, NY, O, S, or Se atom, wherein Ra and Rb each represent a hydrocarbon group having 1 to 12 carbon atoms, which may be united to form a 3- to 6-membered ring, and Y represents a hydrogen atom or an organic group having 1 to 30 carbon atoms; R1 and R2 each represent independently a hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 4 carbon atoms, or an aralkyl group having 7 to 18 carbon atoms; R3 and R4 each represent independently a hydrocarbon group having 1 to 4 carbon atoms or are united to form a heterocycl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.