14192-71-3

Upstream product

• 2359-60-6 4-(1-piperidino)aniline 
• 108-24-7 acetic anhydride 
• 110-89-4 piperidine 
• 539-03-7 N-(4-chlorophenyl)acetamide 
• 6641-28-7 4-(piperidin-1-yl)aniline dihydrochloride 
• 75-36-5 acetyl chloride 
• 103-90-2 4-acetaminophenol 
• 146139-82-4 4'-piperidinoacetophenone oxime 

Downstream Products

• 83858-33-7 N--N-ethylpiperidinium bromide 
• 83858-29-1 N--N-ethylpiperidinium bromide 

Relevant academic research and scientific papers

Catalytic Amination of Phenols with Amines

Given the wide prevalence and ready availability of both phenols and amines, aniline synthesis through direct coupling between these starting materials would be extremely attractive. Herein, we describe a rhodium-catalyzed amination of phenols, which provides concise access to diverse anilines, with water as the sole byproduct. The arenophilic rhodium catalyst facilitates the inherently difficult keto–enol tautomerization of phenols by means of π-coordination, allowing for the subsequent dehydrative condensation with amines. We demonstrate the generality of this redox-neutral catalysis by carrying out reactions of a large array of phenols with various electronic properties and a wide variety of primary and secondary amines. Several examples of late-stage functionalization of structurally complex bioactive molecules, including pharmaceuticals, further illustrate the potential broad utility of the method.

Sulfuryl Fluoride Mediated Synthesis of Amides and Amidines from Ketoximes via Beckmann Rearrangement

A metal-free and redox-neutral method for Beckmann rearrangement employing inexpensive and readily available SO2F2 gas is described. The reported transformation proceeds at ambient temperature and is compatible with a wide range of sterically and electronically diverse aromatic, heteroaromatic, aliphatic and lignin-like oximes providing amides in good to excellent yields. The reaction proceeds through the formation of an imidoyl fluoride intermediate that can also be used for the synthesis of amidines.

Practical and regioselective amination of arenes using alkyl amines

The formation of carbon–nitrogen bonds for the preparation of aromatic amines is among the top five reactions carried out globally for the production of high-value materials, ranging from from bulk chemicals to pharmaceuticals and polymers. As a result of this ubiquity and diversity, methods for their preparation impact the full spectrum of chemical syntheses in academia and industry. In general, these molecules are assembled through the stepwise introduction of a reactivity handle in place of an aromatic C–H bond (that is, a nitro group, halogen or boronic acid) and a subsequent functionalization or cross-coupling. Here we show that aromatic amines can be constructed by direct reaction of arenes and alkyl amines using photocatalysis, without the need for pre-functionalization. The process enables the easy preparation of advanced building blocks, tolerates a broad range of functionalities, and multigram scale can be achieved via a batch-to-flow protocol. The merit of this strategy as a late-stage functionalization platform has been demonstrated by the modification of several drugs, agrochemicals, peptides, chiral catalysts, polymers and organometallic complexes.

Palladium/proazaphosphatrane-catalyzed amination of aryl halides possessing a phenol, alcohol, acetanilide, amide or an enolizable ketone functional group: Efficacy of lithium bis(trimethylsilyl)amide as the base

A commercially available catalyst system comprising Pd(OAc)2 or Pd2(dba)3 and the proazaphosphatrane ancillary ligand P(i-BuNCH2CH2)3N (1) for the amination of aryl halides substituted with a phenol, alcohol, acetanilide, amide or ketone group containing an enolizable hydrogen is described. The reaction is performed in the presence of LiN(SiMe3)2 as the base. Other bases tested were either less effective or completely non-functional.

Aminobenzene compounds to prevent nerve cell degradation

A compound useful for central antioxidant having inhibitory activity of degeneration and necrocytosis of cerebral cells of the formula (I): STR1 wherein A and B are independently (1) a group of the formula: STR2 wherein R1 and R2 are independently hydrogen atom, an optionally substituted hydrocarbon residue or an optionally substituted heterocyclic group, or R1 together with R2 and the nitrogen atom to which they are bound may form a cyclic amino group, provided that both R1 and R2 are not hydrogen atom at the same time, or (2) a group of the formula: STR3 wherein D is O or S, R3 is hydrogen atom, an optionally substituted hydrocarbon residue or an optionally substituted acyl group, m is 1, 2, or 3 and n is 0, 1, 2, 3 or 4; p is 1 or 2, provided that both A may be the same or different when p is 2; and R4, R5 and R6 are independently hydrogen atom, a lower alkyl or a lower alkoxy, or R5 and R6 may bond together to form --CH=CH--CH=CH--, or a salt thereof.

HYDROLYSIS OF N,N'-DISUBSTITUTED 1,4,5,8-NAPHTHALENETETRACATBOXYDIIMIDES.I. STRUCTURE OF HYDROLYSIS PRODUCTS AND POSITION OF EQUILIBRIUM AS A FUNCTION OF THE pH OF THE MEDIUM

N,N'-Diaryl-1,4,5,8-naphthalenetetracarboxydiimides with electron-withdrawing substituents are readily hydrolyzed under physiological conditions with opening of one imide ring, while the second opens at pH>9; N,N'-dialkyl-1,4,5,8-naphth