ChemInform Abstract: Propargylation of 1,3-Dicarbonyl Compounds Catalyzed by 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone and Sodium Nitrite in the Presence of Molecular Oxygen and Formic Acid.

The coupling reaction of 1,3-diarylpropyne and 1,3-dicarbonyl compounds using molecular oxygen as a terminal oxidation was developed. Catalyzed by DDQ and NaNO2 in the presence of HCOOH, the corresponding products were obtained in 37–87% yields.

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Crystallization and preliminary X-ray characterization of the 2,4′-dihydroxyacetophenone dioxygenase fromAlcaligenessp. 4HAP

Acta Crystallographica Section F Structural Biology Communications ◽

10.1107/s2053230x14009649 ◽

2014 ◽

Vol 70 (6) ◽

pp. 823-826 ◽

Cited By ~ 4

Author(s):

G. Beaven ◽

A. Bowyer ◽

P. Erskine ◽

S. P. Wood ◽

A. McCoy ◽

...

Keyword(s):

Synchrotron Radiation ◽

Formic Acid ◽

Molecular Oxygen ◽

Aromatic Ring ◽

Bond Cleavage ◽

Its Sequence ◽

Hydroxybenzoic Acid ◽

X Ray

The enzyme 2,4′-dihydroxyacetophenone dioxygenase (or DAD) catalyses the conversion of 2,4′-dihydroxyacetophenone to 4-hydroxybenzoic acid and formic acid with the incorporation of molecular oxygen. Whilst the vast majority of dioxygenases cleave within the aromatic ring of the substrate, DAD is very unusual in that it is involved in C—C bond cleavage in a substituent of the aromatic ring. There is evidence that the enzyme is a homotetramer of 20.3 kDa subunits each containing nonhaem iron and its sequence suggests that it belongs to the cupin family of dioxygenases. By the use of limited chymotrypsinolysis, the DAD enzyme fromAlcaligenessp. 4HAP has been crystallized in a form that diffracts synchrotron radiation to a resolution of 2.2 Å.

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Pd/C-Catalyzed Direct α-Oxygenation of 1,3-Dicarbonyl Compounds Using Molecular Oxygen

Synlett ◽

10.1055/s-2008-1078023 ◽

2008 ◽

Vol 2008 (15) ◽

pp. 2291-2294 ◽

Cited By ~ 5

Author(s):

Hironao Sajiki ◽

Yasunari Monguchi ◽

Tohru Takahashi ◽

Yusuke Iida ◽

Yuta Fujiwara ◽

...

Keyword(s):

Molecular Oxygen ◽

Dicarbonyl Compounds

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ChemInform Abstract: Selective Oxidation of Unsaturated Alcohols Catalyzed by Sodium Nitrite and 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone with Molecular Oxygen under Mild Conditions.

ChemInform ◽

10.1002/chin.201219033 ◽

2012 ◽

Vol 43 (19) ◽

pp. no-no

Author(s):

Lianyue Wang ◽

Jun Li ◽

Hua Yang ◽

Ying Lv ◽

Shuang Gao

Keyword(s):

Molecular Oxygen ◽

Selective Oxidation ◽

Sodium Nitrite ◽

Mild Conditions ◽

Unsaturated Alcohols

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Catalytic oxidation of cellulose to formic acid in H5PV2Mo10O40 + H2SO4 aqueous solution with molecular oxygen

Green Chemistry ◽

10.1039/c6gc01271j ◽

2016 ◽

Vol 18 (17) ◽

pp. 4725-4732 ◽

Cited By ~ 36

Author(s):

Ting Lu ◽

Muge Niu ◽

Yucui Hou ◽

Weize Wu ◽

Shuhang Ren ◽

...

Keyword(s):

Aqueous Solution ◽

Formic Acid ◽

Catalytic Oxidation ◽

Molecular Oxygen ◽

Heteropoly Acid ◽

Ph Modifier ◽

H2so4 Aqueous Solution

In this work, the most frequently-used heteropoly acid H5PV2Mo10O40 was employed with a pH “modifier” of H2SO4 in aqueous solution for the catalytic oxidation of cellulose to formic acid.

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