Invention Grant
- Patent Title: (Dis)symmetric azomethine-type direct dye comprising at least one pyrazolopyridine unit, process for dyeing keratin fibers using this dye
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Application No.: US16309296Application Date: 2017-06-21
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Publication No.: US10731038B2Publication Date: 2020-08-04
- Inventor: Stéphane Sabelle , Stéphane Blais , Aziz Fadli
- Applicant: L'OREAL
- Applicant Address: FR Paris
- Assignee: L'OREAL
- Current Assignee: L'OREAL
- Current Assignee Address: FR Paris
- Agency: The Marbury Law Group, PLLC
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@1a191828
- International Application: PCT/EP2017/065274 WO 20170621
- International Announcement: WO2017/220670 WO 20171228
- Main IPC: A61Q5/10
- IPC: A61Q5/10 ; C09B55/00 ; A61K8/49 ; C07D471/04 ; C07D519/00 ; C09B53/02
Abstract:
The subject of the present invention is symmetric or dissymetric azomethine direct dyes comprising at least one pyrazolopyridine unit of formula (I), a composition comprising said dyes, a process for treating keratin fibers using said dyes, a process for preparing these compounds, synthesis intermediates and a kit. In which formula (I) X, Y1, Y2, Z1, and R1 to R5 are as defined in the description.
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