Wash the fumarate with aqueous 5% Na2CO3, then with saturated CaCl2 solution, dry with CaCl2 and distil it. [Beilstein 2 IV 2207.]
The Journal of Organic Chemistry, 52, p. 323, 1987 DOI: 10.1021/jo00378a045Tetrahedron Letters, 28, p. 6649, 1987 DOI: 10.1016/S0040-4039(00)96936-3
Diethyl fumarate is manufactured via esterification of ethanol
with fumaric acid.
It is used as a pesticide or comonomer
for the production of polystyrene.
Diethyl fumarate is unsaturated polyester resins are used in applications, such as reinforced glass fiber for boats, piping, bathtubs, roof panels, etc., and as protective coatings, finishes, and lacquers.
ChEBI: A dieter obtained by the formal condensation of fumaric acid with ethanol.