Highly selective catalytic nitration of 1-nitronaphthalene with NO2 to 1,5-dinitronaphthalene over solid superacid SO42−/ZrO2 promoted by molecular oxygen and acetic anhydride under mild conditions

2021 ◽  
Author(s):  
Jiaqi Yan ◽  
Wenjin Ni ◽  
Kuiyi You ◽  
Ting Duan ◽  
Renjie Deng ◽  
...  
Keyword(s):  
Acetic Anhydride ◽  
Molecular Oxygen ◽  
Solid Superacid ◽  
Mild Conditions ◽  
Catalytic Nitration

An unusual reaction of a bridged triterpenoid α-diketone with acetic anhydride

1991 ◽  
Vol 56 (12) ◽  
pp. 2917-2935 ◽  
Author(s):  
Eva Klinotová ◽  
Václav Křeček ◽  
Jiří Klinot ◽  
Miloš Buděšínský ◽  
Jaroslav Podlaha ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Nmr Spectroscopy ◽  
Acetic Anhydride ◽  
Spectral Methods ◽  
X Ray Diffraction ◽  
X Ray ◽  
Mild Conditions ◽  
Condensation Products ◽  
Unsaturated Lactones ◽  
C Nmr

3β-Acetoxy-21,22-dioxo-18α,19βH-ursan-28,20β-olide (IIIa) reacts with acetic anhydride in pyridine under very mild conditions affording β-lactone IVa and γ-lactones Va and VIIa as condensation products. On reaction with pyridine, lactones Va and VIIa undergo elimination of acetic acid to give unsaturated lactones VIIIa and IXa, respectively. Similarly, the condensation of 20β,28-epoxy-21,22-dioxo-18α,19βH-ursan-3β-yl acetate (IIIb) with acetic anhydride leads to β-lactone IVb and γ-lactone Vb; the latter on heating with pyridine affords unsaturated lactone VIIIb and 21-methylene-22-ketone Xb. The structure of the obtained compounds was derived using spectral methods, particularly 1H and 13C NMR spectroscopy; structure of lactone IVa was confirmed by X-ray diffraction.

Novel oxidation of toluenes catalyzed by reusable vanadyl(IV) sulfate under mild conditions with molecular oxygen

2010 ◽  
Vol 51 (17) ◽  
pp. 2225-2227 ◽  
Author(s):  
Takeo Nakai ◽  
Toshiyuki Iwai ◽  
Masatoshi Mihara ◽  
Takatoshi Ito ◽  
Takumi Mizuno
Keyword(s):  
Molecular Oxygen ◽  
Mild Conditions

Photocatalytic asymmetric epoxidation of trans-stilbene with manganese–porphyrin/graphene-oxide nanocomposite and molecular oxygen: axial ligand effect

2020 ◽  
Vol 10 (10) ◽  
pp. 3290-3302 ◽  
Author(s):  
Elahe Ahadi ◽  
Hassan Hosseini-Monfared ◽  
Alex Spieß ◽  
Christoph Janiak
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Molecular Oxygen ◽  
Axial Ligand ◽  
Asymmetric Epoxidation ◽  
Manganese Porphyrin ◽  
Ligand Effect ◽  
Mild Conditions ◽  
Trans Stilbene ◽  
Visible Light Driven

An efficient, visible light-driven manganese–porphyrin photocatalyst was developed for the asymmetric epoxidation of trans-stilbene by molecular oxygen under mild conditions.

Formation of 1,3,4-Oxadiazoles by Cyclisation of Acetoacetanilide Acylhydrazones under Mild Conditions

2002 ◽  
Vol 2002 (2) ◽  
pp. 82-83 ◽  
Author(s):  
Igor B. Dzvinchuk ◽  
Sergey A. Kartashov ◽  
Myron O. Lozinskii ◽  
Eduard B. Rusanov ◽  
Alexander N. Chernega
Keyword(s):  
Acetic Anhydride ◽  
Acid Catalysis ◽  
Mild Conditions

Selective and efficient cyclisation of acetoacetanilide acylhydrazones into previously inaccessible 3-acetyl-2-anilinocarbonylmethyl-2,3-dihydro-2-methyl-1,3,4-oxadiazoles was achieved in acetic anhydride by use of acid catalysis at 40–50°C.

Cobalt(II) Chloride Catalyzed Oxidation of 4-SubstitutedN,N-Dialkylanilines with Molecular Oxygen in the Presence of Acetic Anhydride

1990 ◽  
Vol 19 (5) ◽  
pp. 757-760 ◽  
Author(s):  
Satoru Murata ◽  
Akira Tamatani ◽  
Kaoru Suzuki ◽  
Masahiro Miura ◽  
Masakatsu Nomura
Keyword(s):  
Acetic Anhydride ◽  
Molecular Oxygen ◽  
Catalyzed Oxidation
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