ChemicalBook CAS DataBase List 1,4-Naphthoquinone

1,4-Naphthoquinone synthesis

13synthesis methods

Product Name:1,4-Naphthoquinone
CAS Number:130-15-4
Molecular formula:C10H6O2
Molecular Weight:158.15

1,4-Naphthoquinone is prepared by reacting naphthalene with molecular oxygen in a gaseous phase in the presence of a catalyst containing vanadium.
Prior to reacting the naphthalene with oxygen, the catalyst is pre-treated with molecular oxygen at 300° to 400° C in the absence of organic compounds and immediately thereafter a gas mixture containing naphthalene and molecular oxygen is passed over the pretreated catalyst at temperatures in the range of 300° to 400° C. The catalyst pre-treatment can be carried out in the presence of water vapor and the subsequent reaction of naphthalene with molecular oxygen can also be carried out in the presence of water vapor.

90-15-3 Synthesis

90-15-3
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$9.00/5g

130-15-4
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$16.00/1g

Yield:130-15-4 100%

Reaction Conditions:

with C₁₂₆H₁₁₂O₃₂S₆;oxygen in toluene; for 1.33333 h;Irradiation;

Steps:

4 Synthesis of 1,4-naphthoquinone using the second generation hexathiapentacene dendrimer represented by formula(1b)]

1-naphthol (5.0 mg) was added to to 1mol% toluene solution (4 ml) of second generation hexathiapentacenedendrimer shown in an expression (1b), While sending oxygenby high pressure mercury lamp (USHIO, Inc.) at 80 minutes light irradiation (λ> 300nm), 1,4-naphthoquinone conversionrate 52% ,100% yield could be obtained . The chemical reactionformula is shown below. It revealedthat second generation hexathiapentacene dendrimer shown in an expression(1b) acted as photocatalyst

References:

JP5652856,2015,B2 Location in patent:Paragraph 0093; 0094

84-85-5 Synthesis