ChemicalBook CAS DataBase List Peri acid

Peri acid synthesis

5synthesis methods

Product Name:Peri acid
CAS Number:82-75-7
Molecular formula:C10H9NO3S
Molecular Weight:223.25

Naphthalene is converted to naphthalene-1-sulfonic acid. The crude sulfonation product is diluted with sulfuric acid, and 67.5 % nitric acid is added slowly at 30℃ to give the 5- and 8-nitro derivatives. The products are converted to the readily soluble magnesium salts by addition of a slurry of dolomite. The reaction mixture is neutralized with chalk and filtered hot. The filtrate is run into a suspension of iron powder in boiling water, which is kept slightly acidic with sulfuric acid. When reduction is complete, dissolved iron is precipitated by addition of magnesia, the iron residues are filtered off while hot, and the resulting liquor is acidified to pH 4.5 with sulfuric acid to give 99 % pure Peri acid in 48 % yield. The filtrates are further acidified to precipitate crude Laurent’s acid. This may be purified via its magnesium salt to give a 17 % yield of pure 1,5-isomer.

91-20-3 Synthesis

91-20-3
502 suppliers
$13.19/250mg

82-75-7
280 suppliers
$7.00/25g

Yield:-

Steps:

Multi-step reaction with 5 steps
1: sulfuric acid / 5 h / 80 - 90 °C / Heating; Large scale
2: nitric acid / 3 h / 20 - 40 °C / Cooling
3: dolomite / water / 0.17 h
4: sulfuric acid; iron / 90 - 110 °C
5: 90 °C

References:

Tongling Chemical Group Organic Chemical Co., Ltd;Wu, Fei;Hu, Zhanglai;Zhou, Rui;Cheng, Liansheng CN105503662, 2016, A

FullText

85-47-2
145 suppliers
$11.00/5g

82-75-7
280 suppliers
$7.00/25g

References

117-41-9 Synthesis

117-41-9
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82-75-7
280 suppliers
$7.00/25g

References

85-47-2
145 suppliers
$11.00/5g

84-89-9 Synthesis

84-89-9
221 suppliers
$8.00/25g

82-75-7
280 suppliers
$7.00/25g

References

7647-01-0
11 suppliers
$10.00/10g

82-65-5 Synthesis

2H-naphth[1,8-cd]isothiazole-3,5-disulphonic acid 1,1-dioxide

82-65-5
6 suppliers
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82-75-7
280 suppliers
$7.00/25g

References

Peri acid Related Search:

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