ChemicalBook CAS DataBase List Acenaphthene-5,6-dicarboxylic anhydride

Acenaphthene-5,6-dicarboxylic anhydride synthesis

5synthesis methods

Product Name:Acenaphthene-5,6-dicarboxylic anhydride
CAS Number:5699-00-3
Molecular formula:C14H8O3
Molecular Weight:224.21

5,6-Acenaphthylenedicarboxamide,1,2-dihydro-N5,N5,N6,N6-tetramethyl-

31458-06-7
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5699-00-3
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Yield:5699-00-3 68.7%

Reaction Conditions:

with hydrogenchloride;lithium hydroxide monohydrateReflux;

Steps:

1A Synthesis of 1,2-dihydroacenaphthylene dicarboxylic acid anhydride.

Synthesis of 1,2-dihydroacenaphthylene dicarboxylic acid anhydride. N5 ,N5 ,N6,N6-tetramethyl- 1 ,2-dihydroacenaphthylene-5 ,6-dicarboxamide (4.0 g, 13.5 mmol) was suspended in 10 mL of concentric hydrochloric acid. The mixture was heated to reflux for 4-5 hours. The solution was then cooled to 0 °C. The off-white precipitate was collected by filtration and washed with cold water. The crude materials were recrystallized from hot acetic anhydride solution to afford pure product as light brown needles. Yield (2.08 g, 68.7%). ‘H NMR (CDC13, 500.046 MHz): 8= 8.54 (d, 2H, 3J = 7.0 Hz, Np), 7.65 (d, 2H, 3J =7.0 Hz, Np), 3.45 (s, 4H, CH2).

References:

WO2014/31750,2014,A1 Location in patent:Page/Page column 40

5698-99-7
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5699-00-3
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References

83-32-9
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$14.00/5g

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References

Cyclopent[fg]acenaphthylene-1,2-dione, 5,6-dihydro-

5254-01-3
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5699-00-3
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References

Acenaphthylene, 5,6-dibromo-1,2-dihydro-

19190-91-1
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$11.00/250mg

5699-00-3
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References