Invention Grant
- Patent Title: Carbazole dioxazine pigments
- Patent Title (中): 咔唑二恶嗪颜料
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Application No.: US14786606Application Date: 2014-04-25
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Publication No.: US09533998B2Publication Date: 2017-01-03
- Inventor: Keki Hormusji Gharda
- Applicant: Keki Hormusji Gharda
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Priority: IN1531/MUM/2013 20130426
- International Application: PCT/IN2014/000264 WO 20140425
- International Announcement: WO2014/181348 WO 20141113
- Main IPC: C07D498/22
- IPC: C07D498/22 ; C08K5/3417 ; C08K5/3437 ; C07D209/62
Abstract:
The present disclosure relates to a benzoyl substituted carbazole-dioxazine pigment and its preparation. The process involves benzoylation of 3-nitro-N-ethylcarbazole in monochlorobenzene using benzoylchloride and ferric chloride to yield 3-nitro-6-benzoyl-N-ethyl carbazole, which on catalytic hydrogenation and subsequent condensation with chloranil and cyclization yields benzoyl substituted carbazole-dioxazine pigment.
Public/Granted literature
- US20160096849A1 CARBAZOLE DIOXAZINE PIGMENTS Public/Granted day:2016-04-07
Information query
