55750-49-7, Ethyl 2,5-dioxo-2,5-dihydro-1H-pyrrole-1-carboxylate is a pyrrolines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated
55750-49-7, a) N-(tert.-butyloxycarbonyl)-2-(N-maleinimido)ethylamine 0.8 g (5 mmol) of the compound produced according to Example 1a is dissolved in 25 ml saturated sodium bicarbonate solution. The solution is filtered over a folded filter and cooled to 0 C. Subsequently 0.84 g (5 mmol) N-(ethoxycarbonyl)maleinimide (produced according to the method of O. Keller and J. Rudinger, Helv. Chim. Acta 58 (1975), 531-541) is added while stirring and it is left to stir for a further 15 min at room temperature. During this the N-(ethoxycarbonyl)maleinimide dissolves completely after a short time while the title compound precipitates during the course of the reaction. 40 ml THF is added and stirred for a further 45 min at room temperature. Afterwards it is adjusted to pH 6.0 with 1n HCl, extracted twice with 50 ml acetic ester and the extract is dried with 5 g Na2 SO4. After evaporation in a water-jet vacuum the title compound is obtained as a colourless, solid residue. Yield: 1.1 g (92% of the theoretical yield). TLC: silica gel, chloroform/acetic ester (66/33 v/v), spray with 0.1% KMnO4 solution; Rf =0.50.
As the paragraph descriping shows that 55750-49-7 is playing an increasingly important role.
Reference£º
Patent; Boehringer Mannheim GmbH; US5595741; (1997); A;,
Pyrroline – Wikipedia
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