1503-91-9

Usage

InChI:InChI=1/C8H8ClNO2/c1-6(11)10(12)8-4-2-7(9)3-5-8/h2-5,12H,1H3

Upstream product

• 10416-61-2 N-(4-Chlorphenyl)-N-(trimethylsilyl)-acetamid 
• 932-98-9 1-chloro-4-nitroso-benzene 
• 127-17-3 2-oxo-propionic acid 
• 91631-54-8 N-sulfonoxy-p-chloroacetanilide pyridinium salt 
• 75-36-5 acetyl chloride 
• 586-96-9 Nitrosobenzene 
• 1795-83-1 N-Phenylacetohydroxamic acid 
• 100-00-5 4-chlorobenzonitrile 
• 106-47-8 4-chloro-aniline 
• 113-24-6 sodium pyruvate 
• 431-03-8 dimethylglyoxal 
• 539-03-7 N-(4-chlorophenyl)acetamide 
• 823-86-9 N-(4-chlorophenyl)hydroxylamine 

Downstream Products

• 94353-40-9 N-acetyl-5-chloroindole 
• 539-03-7 N-(4-chlorophenyl)acetamide 
• 81617-50-7 N-(2-Acetylamino-5-chloro-phenyl)-N-methyl-4-nitro-benzamide 
• 6975-29-7 N-(2,4-dichlorophenyl)acetamide 
• 16323-09-4 N-(4-chloro-2-hydroxyphenyl)acetamide 
• 81375-85-1 C₈H₇ClNO₂ 
• 823-86-9 N-(4-chlorophenyl)hydroxylamine 
• 27688-31-9 N-(4-Chloro-phenyl)-N-[2-(2,4,5-trichloro-phenoxy)-propionyloxy]-acetamide 
• 1356933-19-1 N-(4-chlorophenyl)acetohydroxamic acid 2,3,4,6-tetra-O-acetyl-β-D-glucopyranoside 
• 1356933-37-3 C₁₂H₁₆ClNO₆ 

Relevant academic research and scientific papers

C-N bond formation followed by N-Cl bond breaking. One more and unexpected case of the formation of a hydroxamic group via heterolytic bond cleavage

An unexpected and previously unknown reaction sequence in the interactions of the acyl halides with nitrosobenzenes, which involves carbon-nitrogen bond formation followed by heterolytic nitrogen-chlorine bond cleavage giving the corresponding unsubstituted N-phenylalkylhydroxamic acids (or N-phenylarylhydroxamic acids) and chlorine as the products has been observed. The kinetic and other evidence obtained suggest that the carbon-nitrogen bond formation is the consequence of a nucleophilic interaction of an N-phenylchlorohydroxylamine intermediate, formed in the first reaction step, with the acyl halide in the second step of the complex sequence, which leads to an N-acyl-N-chlorophenylhydroxylamine cation intermediate. The key reaction step involves the interaction of an N-acyl-N-chlorophenylhydroxylamine cation intermediate with chloride ion, which leads to the N-Cl heterolytic bond cleavage and the final formation of the hydroxamic group and a molecule of chlorine.

Transketolase Catalyzed Synthesis of N-Aryl Hydroxamic Acids

Hydroxamic acids are metal-chelating compounds that show important biological activity including anti-tumor effects. We have recently engineered the transketolase from Geobacillus stearothermopilus (TKgst) to convert benzaldehyde as a non-natur

Catalyst-free generation of acyl radicals induced by visible light in water to construct C-N bonds

We describe herein a catalyst-free and redox-neutral photochemical strategy for the direct generation of acyl radicals from α-diketones, and its selective conversion of nitrosoarenes to hydroxyamides or amides with AcOH or NaCl as an additive. The reaction was carried out under mild conditions in water with purple LEDs as the light source. A broad scope of substrates was demonstrated. Mechanistic experiments indicate that α-diketones cleave to give acyl radicals, with hydroxyamides being further reduced to amides.

Hydroxamic Acids as Chemoselective (ortho-Amino)arylation Reagents via Sigmatropic Rearrangement

The use of readily available hydroxamic acids as reagents for the chemoselective (ortho-amino)arylation of amides is described. This reaction proceeds under metal-free, mild conditions, displays a very broad scope, and constitutes a direct approach for the metal-free attachment of aniline residues to carbonyl derivatives.

Mechanistic studies on intramolecular C-H trifluoromethoxylation of (hetero)arenes via OCF3-migration

The one-pot two-step intramolecular aryl and heteroaryl C-H trifluoromethoxylation recently reported by our group has provided a general, scalable, and operationally simple approach to access a wide range of unprecedented and valuable OCF3-containing building blocks. Herein we describe our investigations to elucidate its reaction mechanism. Experimental data indicate that the O-trifluoromethylation of N-(hetero)aryl-N-hydroxylamine derivatives is a radical process, whereas the OCF3-migration step proceeds via a heterolytic cleavage of the N-OCF3 bond followed by rapid recombination of a short-lived ion pair. Computational studies further support the proposed ion pair reaction pathway for the OCF3-migration process. We hope that the current study would provide useful insights for the development of new transformations using versatile N-(hetero)aryl-N-hydroxylamine synthons.

TRIFLUOROMETHOXYLATION OF ARENES VIA INTRAMOLECULAR TRIFLUOROMETHOXY GROUP MIGRATION

The present invention provides a process of producing a trifluoromethoxylated aryl or trifluoromethoxylated heteroaryl having the structure: (I), wherein A is an aryl or heteroaryl, each with or without subsutitution; and R1 is -H, -(alkyl), -(alkenyl), -(alkynyl), -(aryl), -(heteroaryl), - (alkylaryl), - (alkylheteroaryl), -NH-(alkyl), -N(alkyl)2, -NH-(alkenyl), -NH-(alkynyl) -NH-(aryl), -NH-(heteroaryl), -O-(alkyl), -O-(alkenyl), -O-(alkynyl), -O-(aryl), -O-(heteroaryl), -S-(alkyl), -S- (alkenyl), -S-(alkynyl), -S-(aryl), or -S-(heteroaryl), comprising: (a) reacting a compound having the structure: (II), with a trifluoromethylating agent in the presence of a base in a first suitable solvent under conditions to produce a compound having the structure: (III); and (b) maintaining the compound produced in step (a) in a second suitable solvent under conditions sufficient to produce the trifluoromethoxylated aryl or trifluormethoxylated heteroaryl having the structure: (I).

Rhodium(III)-catalyzed internal oxidative coupling of N-hydroxyanilides with alkenes via C-H activation

Abstract Described herein is an efficient new method for ortho-olefination of anilides in the presence of AgSbF6 and NaOAc via rhodium(III)-catalyzed internal oxidative C-H bond activation based on hydroxyl as directing and oxidative group. A range of alkenes and functional groups on acetanilides is supported and a possible mechanism is proposed according to the experimental results.

Trifluoromethoxylation of arenes: Synthesis of ortho- Trifluoromethoxylated aniline derivatives by OCF3 migration

Aryl trifluoromethoxylation by a two-step sequence of O-trifluoromethylation of N-aryl-N-hydroxylamine derivatives and intramolecular OCF3 migration is presented. This protocol allows easy access to a wide range of synthetically useful ortho-OCF3 aniline derivatives. In addition, it utilizes bench-stable reagents, is operationally simple, shows high functional-group tolerance, and is amenable to gram-scale as well as one-pot synthesis.Areaction mechanism of a heterolytic cleavage of the N-OCF3 bond followed by recombination of the resulting nitrenium ion and trifluoromethoxide is proposed for the OCF3-migration reaction.

Reaction of aromatic nitroso compounds with chemical models of 'thiamine active aldehyde'

Aromatic nitroso compounds in the presence of base and 2-(α-hydroxyalkyl)-3,4-dimethylthiazolium trifluoromethanesulfonate and related salts furnish in variable yields O- and N-acyl-aryl hydroxylamines and 3,4-dimethylthiazolium trifluoromethanesulfonate. A primary kinetic isotope effect of 4.9, obtained for the appropriate 2α-deuterated thiazolium salt, points to the C2α-H bond cleavage as the rate determining step. Radical species detected by ESR were unambiguously identified as phenylhydronitroxide, but attempted trapping of the corresponding C-heterocyclic radicals by TEMPO was not successful, and substrates incorporating a potential cyclopropyl radical clock gave products with the cyclopropyl ring intact. Theoretical calculations revealed a large activation energy for such reaction, which thus cannot per se exclude the intervention of such radical species. Evidence for the likely operation of two concurrent mechanisms, a radical and a preponderant ionic pathway, involving the conjugate base of the thiazolium salt, as the chemical model for 'active thiamine', and ArNO is presented for the formation of the products of the reaction.

An unusual case of carbon-nitrogen bond formation. Reactivity of a C-nitroso group toward acyl chlorides

Acyl chlorides react with nitrosobenzene in 99.9% acetonitrile and in the presence of catalytic amounts of HCl giving the corresponding N-p-chlorophenylhydroxamic acids. The spectroscopic and kinetic evidence obtained indicates that the reaction is initia