6-(biphenyl-ester)-3H-naphtho[2,1-b]pyrans as photochromic dichroic dyes and optical article containing them
US8436184B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2007 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | May 28, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D455/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A naphthopyran compound represented by the formula (I) wherein: n1, n2, p, m and q represent an integer; R1, R2 and R4, represent a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —NRbRc, —CO—Ra, —CO2Ra1, —OC(O)—Rd, —X—(Re)—Y, linear or branched (C1-C18) perfluoroalkyl group, wherein Ra, Ra1, Rb, Rc, X, Y, Re, and Rd are as defined in the description; Z represents a group selected from CO, CS, SO, SO2, CO2, C(O)S, CS2, C(O)NH, C(O)NRa, C(S)NH, C(S)NRa and C═NRa; R3 represents a group selected from halogen, —Ra, linear or branched (C1-18) perfluoroalkyl group —OH, —ORa, —SH, —SRa, —NH2, and —NRaRa1; R6 represents a group selected from —Ra which may be optionally substituted, linear or branched (C1-18) perfluoroalkyl, cycloalkyl, heterocycloalkyl, aryl, and heteroaryl, which may be optionally substituted; R5 represents a group selected from: halogen, —Ra, linear or branched (C1-18) perfluoroalkyl group, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —CO—Ra, —O—C(O)—Ra and —CO2Ra1; or when q is equal to 2, then two R5 together represents further a group —O—(CH2)q1—O— wherein q1 represents an integer comprised from 1 to 3 inclusive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.