92157-77-2

Upstream product

• 92848-50-5 3,6,6-trimethyl-5-methylcarbamoyl-2,4-dioxo-3-aza-bicyclo[3.1.0]hexane-1-carboxylic acid methyl ester 
• 108-59-8 malonic acid dimethyl ester 
• 22035-53-6 dimethyl isopropylidenemalonate 
• 110622-26-9 2,4-Bis-methoxycarbonyl-3,3-dimethyl-pentanedioic acid dimethyl ester 
• 186581-53-3 diazomethane 
• 90536-93-9 3,3-Dimethyl-cyclopropan-1,1,2,2-tetracarbonsaeure 

Relevant academic research and scientific papers

ELECTROCHEMICAL CYCLIZATION OF TETRAMETHYL ESTERS OF 2-SUBSTITUTED PROPANE-1,1,3,3-TETRACARBOXYLIC ACIDS IN THE PRESENCE OF SALTS OF HYDROHALIC ACIDS

The chemical and electrochemical cyclization of tetramethyl esters of 2-substituted propane-1,1,3,3-tetracarboxylic acids in the presence of hydrohylic acid salt mediators were studied.It was found that the chemical variant of the cyclization of the corresponding α,α'-dianions of esters of propane-1,1,3,3-tetracarboxylic acids by the action of iodine or bromine is substantially inferior to the electrochemical variant.In the latter case, the esters of substituted cyclopropane-1,1,3,3-tetracarboxylic acids are formed in a 87-98percent yield.The tetramethyl ester of 2-isopropylpropane-1,1,3,3-tetracarboxylic acid, which under the electrolysis conditions decomposes according to a Michael retroreaction is an exception.