56768-13-9

Upstream product

• 79-37-8 oxalyl dichloride 
• 147-82-0 2,4,6-tribromoaniline 

Downstream Products

• 1392811-05-0 1,3-bis[(2,4,6-tribromo)phenyl]imidazolinium chloride 
• 1392811-13-0 N,N'-bis(2,4,6-tribromophenyl)-1,2-ethanediamine hydrochloride. 

Relevant academic research and scientific papers

METHOD FOR PRODUCING METHIONINE

A novel method for producing methionine without using hydrogen cyanide as a raw material has been demanded. A method for producing methionine including a step A of oxidizing 4-methylthio-2-oxo-1-butanal in the presence of an alcohol; a step B of hydrolyzing a 4-methylthio-2-oxo-butanoic acid ester obtained in the step A; and a step C of subjecting 4-methylthio-2-oxo-butanoic acid obtained in the step B to reductive amination.

METHOD FOR PRODUCING METHIONINE

A novel method capable of producing methionine without using hydrogen cyanide as a raw material has been desired. The present invention relates to a method for producing methionine including Step A of oxidizing 4-methylthio-2-oxo-1-butanal in the presence of an alcohol, and Step B of reductively aminating 4-methylthio-2-oxo-butyrate obtained in Step A. It is preferable that Step A is carried out by reacting 4-methylthio-2-oxo-1-butanal, the alcohol and an oxidizing agent in the presence of a carbene catalyst.

PROCESS FOR PRODUCING ALPHA-HYDROXYKETONE COMPOUND

An object of the present invention is to produce an α-hydroxyketone compound easily and effectively. Provided is a process for producing an α-hydroxyketone compound comprising a stirring step of stirring one or more aldehyde compounds or polymers thereof in the presence of a base and an imidazolinium salt represented by the formula (1): wherein R1 and R2 each independently represent a hydrogen atom, an alkyl group optionally having a substituent or an aryl group optionally having a substituent, or R1 and R2 are bound to each other to form a ring together with carbon atoms to which they bind, R3 and R4 each independently represent an aryl group having one or more electron withdrawing groups, and X? represents an anion.

PROCESS FOR PRODUCING CARBOXYLIC ACID ESTER

An object of the present invention is to provide a new process which can produce a carboxylic acid ester from an aldehyde. The object is achieved by a process for producing a carboxylic acid ester, including the step of mixing a compound represented by the formula (2-1): (wherein R2 represents an alkyl group optionally having a substituent, or the like; R3 and R4 each represent independently an alkyl group optionally having a substituent, or the like, or R3 and R4 are taken together to form a divalent hydrocarbon group optionally having a substituent, or the like; Y represents a group represented by -S- or a group represented by -N(R5)-; R5 represents an alkyl group optionally having a substituent, or the like, or R5 is taken together with R4 to form a divalent hydrocarbon group optionally having a substituent; and X- represents an anion), a base, an alcohol, oxygen and an aldehyde to oxidize the aldehyde.