ChemicalBook CAS DataBase List Pigment Red 179

Pigment Red 179 synthesis

4synthesis methods

Product Name:Pigment Red 179
CAS Number:5521-31-3
Molecular formula:C26H14N2O4
Molecular Weight:418.4

2-methyl-1H-benz[de]isoquinoline-1,3(2H)-dione

2382-08-3
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5521-31-3
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Yield:5521-31-3 85%

Reaction Conditions:

with 1-methyl-1H-imidazole;sodium ethanolate;1,8-diazabicyclo[5.4.0]undec-7-ene at 160; for 3 h;

Steps:

1 Example 1

Add dehydrated 99g to a 500ml four-necked flask N-methylimidazole and 1g DBU,N-methyl-1,8-naphthalimide 10g and sodium ethoxide 0.1g were added with stirring.The temperature was raised to 160 ° C, and after 3 hours of reaction, it was cooled.Transferring the reaction system to a rotary evaporator, distilling under reduced pressure, and recovering the solvent;The solid product was washed sequentially with water and DMF to give a reddish brown product.The yield was 85%.

References:

CN109535767,2019,A Location in patent:Paragraph 0026-0028

128-69-8 Synthesis