875289-85-3

Upstream product

• 10342-83-3 4'-Bromopropiophenone 
• 38786-67-3 2-bromo-1-(4-bromophenyl)propan-1-one 
• 23773-30-0 (4-bromophenyl)-1-propyne 

Downstream Products

• 87124-01-4 2-amino-1-(4-bromo-phenyl)-propan-1-one; hydrochloride 

Relevant academic research and scientific papers

Structural spectroscopic study of enantiomerically pure synthetic cathinones and their major metabolites

New psychoactive substances (NPSs) have become a popular alternative to illicit drugs of abuse. However, to determine their metabolic pathways in the human organism, a detailed knowledge of their structure is crucial. Here, we present a comprehensive spectroscopic structural study of synthetic cathinones (clephedrone, flephedrone, and brephedrone) and their major human metabolites, desmethyl derivatives. Chiral high-performance liquid chromatography was utilized to obtain the individual enantiomers of the parent synthetic cathinones and their assumed major metabolites synthesized de novo. The developed chromatographic method made it possible to obtain the target optically pure substances on a multimilligram scale. Electronic and vibrational circular dichroism, combined with infrared and ultraviolet spectroscopy and supported by DFT calculations, were used to determine their absolute configuration and the chiroptical methods to elucidate their molecular structure in detail. Two stable conformers of each substance were found in aqueous solution. Their relative abundances were estimated based on the Boltzmann distribution and the population weighted spectra were obtained. Very good agreement was achieved between the experimental and simulated spectra, enabling the 3D structures of the studied substances to be determined in aqueous solution. This journal is

A α - azido carbonyl compound and its preparation method (by machine translation)

The invention relates to a kind of α - azido carbonyl compound and its preparation method, in organic solvent, in order to end alkyne with trimethyl silicon nitrine as reaction raw material, in the copper catalysts and the persulfate oxidizing agent under the action of the common promotion, through the alkyne of double-functionalized α - azido obtained by reaction of a carbonyl compound. Azido free radical oxidation using air as the oxidizing agent in the terminal played a key role in the reaction process. The method substrate range widely, room temperature operation, mild reaction conditions, after treatment is simple and the yield of the product and high purity, is α - azido carbonyl compound has opened up a new synthetic route and method, and has good application potential and research value. (by machine translation)

Azidation of β-keto esters and silyl enol ethers with a benziodoxole reagent

The efficient azidation of β-keto esters and silyl enol ethers using a benziodoxole-derived azide transfer reagent is reported. The azidation of cyclic β-keto esters could be achieved in up to quantitative yields in the absence of any catalyst. In the case of less reactive linear β-keto esters and silyl enol ethers, complete conversion and good yields could be obtained by using a zinc catalyst.