发明名称 |
CARBAZOLE DIOXAZINE PIGMENT AND A METHOD FOR ITS PREPARATION |
摘要 |
The present disclosure provides carbazole-dioxazine pigment of Formula I;;;wherein,
R is C1-C8 alkyl group, preferably R is an ethyl group,R1 is a chloro group, andR2 is a —NHC(═O)Ph group.;The pigment is synthesized from 3-nitro-N-ethylcarbazole. The first step is nitration of 3-nitro-N-ethylcarbazole to form 3,6-dinitro-N-ethylcarbazole which is reduced to form 3-amino-6-nitro-N-ethylcarbazole. This amino compound is benzoylated to form 3-benzamido-6-nitro-N-ethylcarbazole which is then hydrogenated to form 6-amino-3-benzamido-N-ethylcarbazole. Condensation of 6-amino-3-benzamido-N-ethylcarbazole with chlroanil provides an intermediate. Cyclization of the intermediate in the presence of a cyclization reagent provides the compound of Formula-I. The pigment has wavelength of maximum absorption (λm) at 571 nm in dimethylformamide as a solvent. |
申请公布号 |
US2016137844(A1) |
申请公布日期 |
2016.05.19 |
申请号 |
US201414896876 |
申请日期 |
2014.06.11 |
申请人 |
GHARDA Keki Hormusji |
发明人 |
GHARDA Keki Hormusji |
分类号 |
C09B19/02 |
主分类号 |
C09B19/02 |
代理机构 |
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代理人 |
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主权项 |
1. A carbazoledioxazine pigment of Formula I; wherein, R is C1-C8 alkyl group, preferably R is an ethyl group, R1 is a chloro group, and R2 is a —NHC(═O)Ph group. |
地址 |
Mumbai, Maharashtra IN |