41793-20-8

Basic information

• Product Name: diethyl bis(methylene)butanedioate
• Synonyms: diethyl bis(methylene)butanedioate
• CAS NO: 41793-20-8
• Molecular Weight: 198.219
• Mol File: 41793-20-8.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: diethyl bis(methylene)butanedioate(CAS DataBase Reference)
• NIST Chemistry Reference: diethyl bis(methylene)butanedioate(41793-20-8)
• EPA Substance Registry System: diethyl bis(methylene)butanedioate(41793-20-8)

Safety Data

• Hazardous Substances Data: 41793-20-8(Hazardous Substances Data)

Upstream product

• 617-35-6 2-oxo-propionic acid ethyl ester 

Downstream Products

• 488-20-0 buta-1,3-diene-2,3-dicarboxylic acid 

Relevant articles and documents

Synthesis of Itaconic Acid Ester Analogues via Self-Aldol Condensation of Ethyl Pyruvate Catalyzed by Hafnium BEA Zeolites

Lewis acidic zeolites are used to synthesize unsaturated dicarboxylic acid esters via aldol condensation of keto esters. Hafnium-containing BEA (Hf-BEA) zeolites catalyze the condensation of ethyl pyruvate into diethyl 2-methyl-4-oxopent-2-enedioate and diethyl 2-methylene-4-oxopentanedioate (an itaconic acid ester analogue) with a selectivity of ca. 80% at ca. 60% conversion in a packed-bed reactor. The catalyst is stable for 132 h on stream, reaching a turnover number of 5110 molEP molHf-1. Analysis of the dynamic behavior of Hf-BEA under flow conditions and studies with Na-exchanged zeolites suggest that Hf(IV) open sites possess dual functionality for Lewis and Br?nsted acid catalysis.