1-[(2-nitrophenyl)azo]-2-naphthol synthesis
- Product Name:1-[(2-nitrophenyl)azo]-2-naphthol
- CAS Number:6410-09-9
- Molecular formula:C16H11N3O3
- Molecular Weight:293.28
Yield:6410-09-9 99%
Reaction Conditions:
Stage #1: 2-nitro-anilinewith sulfuric acid;sodium nitrite in water at 20; for 0.333333 h;
Stage #2: β-naphthol in water at 20; for 2 h;
Steps:
47 A method for synthesizing C.I. Pigment Orange 2 by one-pot method promoted by solid particles, the steps are as follows:
10 g of polytetrafluoroethylene particles (about 70 mg/particle) and 6.942 g (10 molar equivalents) of sulfuric acid were added to the reaction vessel.(98%, equivalent to 6.667g of 100% sulfuric acid and 0.14ml of water),1.054 g (1.1 molar equivalent) o-nitroaniline, 0.550 g(1.15 molar equivalents) sodium nitrite,When the mixture was stirred for 20 minutes at room temperature with a modified mechanical stirring paddle, the thin-plate chromatography was used to detect the adjacent nitrate.The aniline was completely converted, and 1.000 g (1 molar equivalent) of 2-naphthol was added.Stirring was continued at room temperature. After 120 minutes of reaction,The reaction was completed by thin-plate chromatography, filtered and rinsed with 10 mL of water.The filter cake is dried to obtain 2.080 g of C.I. Pigment Orange 2, the reaction mother liquor andThe rinse solution is reserved for the next cycle. The product yield is greater than 99%.
References:
CN108912723,2018,A Location in patent:Paragraph 0236; 0237; 0238
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