403-42-9

Usage

Chemical Properties

Clear colorless to slightly yellow liquid

Uses

Different sources of media describe the Uses of 403-42-9 differently. You can refer to the following data:
1. 4’Fluoroacetophenone is an intermediate used for the synthetic preparation of various pharmaceutical good and agricultural products.
2. 4-Fluoroacetophenone can be used as organic synthesis intermediates and pharmaceutical intermediates, mainly used in laboratory research and development processes and chemical production processes.
3. 4’-Fluoroacetophenone is an intermediate used for the synthetic preparation of various pharmaceutical good and agricultural products.

Synthesis

General procedure: Oximes (1.0 mmol), Amberlyst-15 (0.02 g), FPA53-NO2(0.02 g), and solvent (1.5 mL) were introduced into a 25-cm-high, 90-mL autoclave with a glass tube inside equipped with magnetic stirrer (Scheme 2). Then the autoclave was charged with oxygen to 0.1 MPa. The reaction mixture was stirred at desirable temperature for special time. Progress of the reaction was monitored by thin-layer chromatography (TLC) or gas chromatography (GC). After the reaction, the resin (Amberlyst-15 and FPA53-NO2) was separated from the reaction mixture by filtration and extracted with 3 mL CH3CN (2 1.5 ml). The solvent was removed under reduced pressure. The residue was further purified by column chromatography on silica gel (300 mesh) with hexane/ethyl acetate to give the corresponding carbonyl compounds.

Upstream product

• 462-06-6 fluorobenzene 
• 108-24-7 acetic anhydride 
• 403-43-0 4-fluorobenzoyl chloride 
• 75-36-5 acetyl chloride 
• 60-29-7 diethyl ether 
• 352-13-6 4-flourophenylmagnesium bromide 
• 75-05-8 acetonitrile 
• 75-75-2 methanesulfonic acid 
• 87261-60-7 N-(4-acetylphenylazo)piperidine 
• 766-98-3 1-ethynyl-4-fluorobenzene 
• 64-19-7 acetic acid 
• 77581-45-4 N-Benzyl-N-[2-(4-fluoro-phenyl)-2-oxo-ethyl]-4-methyl-benzenesulfonamide 
• 98-86-2 acetophenone 
• 73585-52-1 1-(1,1-dimethoxyethyl)-4-fluorobenzene 

Downstream Products

• 582-70-7 1-(4-fluoro-phenacyl)-pyridinium; iodide 
• 441-28-1 2-(4-fluorophenyl)-quinoline-4-carboxylic acid 
• 391-23-1 6-bromo-2-(4-fluoro-phenyl)-quinoline-4-carboxylic acid 
• 582-65-0 1-(4-fluorophenyl)-4,4,4-trifluoro-1,3-butanedione 
• 22966-25-2 (E)-1-(4-fluorophenyl)-3-phenyl-2-propen-1-one 
• 126443-11-6 4'-fluoro-4-methoxy-trans-chalcone 
• 339-23-1 1-(4-fluorophenyl)-1-phenylethan-1-ol 
• 565-31-1 2-(4-fluorophenyl)-2-methyl-1,3-dithiolane 
• 451-29-6 4,4,4-trichloro-1-(4-fluorophenyl)-3-hydroxybutan-1-one 
• 2805-55-2 2,4'-difluoro-trans-chalcone 
• 3792-93-6 (E)-1-(4-fluorophenyl)-3-(2-nitrophenyl)prop-2-en-1-one 
• 459-47-2 1-ethyl-4-fluorobenzene 
• 403-41-8 1-(4-Fluorophenyl)ethanol 
• 842-80-8 2,4-bis(4-fluorophenyl)thiophene 

Relevant academic research and scientific papers

Mesoporous Silica Supported Au Nanoparticles with Controlled Size as Efficient Heterogeneous Catalyst for Aerobic Oxidation of Alcohols

A series of Au catalysts with different sizes were synthesized and employed on amine group functionalized ordered mesoporous silica solid supports as catalyst for the aerobic oxidation of various alcohols. The mesoporous silica of MCM-41 supported Au nano

Structure-Guided Evolution of Aryl Alcohol Oxidase from Pleurotus eryngii for the Selective Oxidation of Secondary Benzyl Alcohols

Aryl alcohol oxidase (AAO) is a fungal flavoenzyme capable of oxidizing aromatic primary alcohols into their correspondent aldehydes through a stereoselective hydride abstraction. Unfortunately, this enzyme does not act on secondary benzyl alcohols in racemic mixtures due to the strict control of substrate diffusion and positioning at the active site restricted to primary benzyl alcohols. Here we describe the engineering of AAO from Pleurotus eryngii to oxidize chiral benzyl alcohols with high enantioselectivity. The secondary benzyl alcohol oxidase was remodeled at the active site through four cycles of structure-guided evolution, including a final step of in vivo site-directed recombination to address the positive epistatic interactions between mutations. The final variant, with five substitutions and a renovated active site, was characterized at biochemical and computational level. The mutational sculpting helped position the bulkier (S)-1-(p-methoxyphenyl)-ethanol, improving the mutant's catalytic efficiency by three orders of magnitude relative to the native enzyme while showing a high enantioselectivity (ee >99%). As a promising candidate for racemic resolution, this evolved secondary benzyl alcohol oxidase maintained its natural stereoselective mechanism while displaying activity on several secondary benzyl alcohols. (Figure presented.).

Efficient oxidation of benzylic alcohols with trichloroisocyanuric acid and ionic liquid in water

A new environmentally friendly method for oxidation of benzylic alcohols to aldehydes or ketones has been developed using trichloroisocyanuric acid and [bmim]BF4 in water.

Selective Activation of Unstrained C(O)-C Bond in Ketone Suzuki-Miyaura Coupling Reaction Enabled by Hydride-Transfer Strategy

A Rh(I)-catalyzed ketone Suzuki-Miyaura coupling reaction of benzylacetone with arylboronic acid is developed. Selective C(O)-C bond activation, which employs aminopyridine as a temporary directing group and ethyl vinyl ketone as a hydride acceptor, occurs on the alkyl chain containing a β-position hydrogen. A series of acetophenone products were obtained in yields up to 75%.

Visible light-mediated, high-efficiency oxidation of benzyl to acetophenone catalyzed by fluorescein

An environmentally friendly aerobic oxidation of benzyl C(sp3)-H bonds to ketones via selective oxidation catalysis was developed. Fluorescein is an efficient photocatalyst with excellent chemical selectivity. The reaction has a wide substrate scope, and a successful gram-scale experiment demonstrated its potential industrial utility.

SBA-15 Supported 1-Methyl-2-azaadamanane N-Oxyl (1-Me-AZADO) as Recyclable Catalyst for Oxidation of Alcohol

Herein, we designed and synthesized an SBA-15 supported 1-methyl-2-azaadamanane N-oxyl (1-Me-AZADO) and investigated its catalytic performance for selective oxidation of alcohols under Anelli's conditions. The first example of immobilization of 1-Me-AZADO was very important to advance the oxgenation effectively because this supported N-oxyl has excellent catalytic activity for oxidation of alcohols to carbonyl compounds, and more importantly, it can be conveniently recovered and reused at least 6 times without significant effect on its catalytic efficiency.

Visible-light photocatalytic selective oxidation of C(sp3)-H bonds by anion-cation dual-metal-site nanoscale localized carbon nitride

Selective oxidation of C(sp3)-H bonds to carbonyl groups by abstracting H with a photoinduced highly active oxygen radical is an effective method used to give high value products. Here, we report a heterogeneous photocatalytic alkanes C-H bonds oxidation method under the irradiation of visible light (λ= 425 nm) at ambient temperature using an anion-cation dual-metal-site modulated carbon nitride. The optimized cation (C) of Fe3+or Ni2+, with an anion (A) of phosphotungstate (PW123?) constitutes the nanoscale dual-metal-site (DMS). With a Fe-PW12dual-metal-site as a model (FePW), we demonstrate a A-C DMS nanoscale localized carbon nitride (A-C/g-C3N4) exhibiting a highly enhanced photocatalytic activity with a high product yield (86% conversion), selectivity (up to 99%), and a wide functional group tolerance (52 examples). The carbon nitride performs the roles of both the visible light response, and improves the selectivity for the oxidation of C(sp3)-H bonds to carbonyl groups, along with the function of A-C DMS in promoting product yield. Mechanistic studies indicate that this reaction follows a radical pathway catalyzed by a photogenerated electron and hole on A-C/g-C3N4that is mediated by thetBuO˙ andtBuOO˙ radicals. Notably, a 10 g scale reaction was successfully achieved for alkane photocatalytic oxidation to the corresponding product with a good yield (80% conversion), and high selectivity (95%) under natural sunlight at ambient temperature. In addition, this A-C/g-C3N4photocatalyst is highly robust and can be reused at least six times and the activity is maintained.

The dehydrogenative oxidation of aryl methanols using an oxygen bridged [Cu-O-Se] bimetallic catalyst

Herein, we report a new protocol for the dehydrogenative oxidation of aryl methanols using the cheap and commercially available catalyst CuSeO3·2H2O. Oxygen-bridged [Cu-O-Se] bimetallic catalysts are not only less expensive than other catalysts used for the dehydrogenative oxidation of aryl alcohols, but they are also effective under mild conditions and at low concentrations. The title reaction proceeds with a variety of aromatic and heteroaromatic methanol examples, obtaining the corresponding carbonyls in high yields. This is the first example using an oxygen-bridged copper-based bimetallic catalyst [Cu-O-Se] for dehydrogenative benzylic oxidation. Computational DFT studies reveal simultaneous H-transfer and Cu-O bond breaking, with a transition-state barrier height of 29.3 kcal mol?1

Bioinspired Radical-Mediated Transition-Metal-Free Synthesis of N-Heterocycles under Visible Light

A redox-active iminoquinone motif connected with π-delocalized pyrene core has been reported that can perform efficient two-electron oxidation of a class of substrates. The design of the molecule was inspired by the organic redox cofactor topaquinone (TPQ), which executes amine oxidation in the enzyme, copper amine oxidase. Easy oxidation of both primary and secondary alcohols happened in the presence of catalytic KOtBu, which could reduce the ligand backbone to its iminosemiquinonate form under photoinduced conditions. Moreover, this easy oxidation of alcohols under aerobic condition could be elegantly extended to multi-component, one-pot coupling for the synthesis of quinoline and pyrimidine. This organocatalytic approach is very mild (70 °C, 8 h) compared to a multitude of transition-metal catalysts that have been used to prepare these heterocycles. A detailed mechanistic study proves the intermediacy of the iminosemiquinonate-type radical and a critical hydrogen atom transfer step to be involved in the dehydrogenation reaction.

Photoinduced Acetylation of Anilines under Aqueous and Catalyst-Free Conditions

A green and efficient visible-light induced functionalization of anilines under mild conditions has been reported. Utilizing nontoxic, cost-effective, and water-soluble diacetyl as photosensitizer and acetylating reagent, and water as the solvent, a variety of anilines were converted into the corresponding aryl ketones, iodides, and bromides. With advantages of environmentally friendly conditions, simple operation, broad substrate scope, and functional group tolerance, this reaction represents a valuable method in organic synthesis.