Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Molbank called Diethyl pyrrole-2,5-dicarboxylate, Author is Aitken, R. Alan; Bloomfield, Charles; McGeachie, Liam J. R.; Slawin, Alexandra M. Z., which mentions a compound: 70-23-5, SMILESS is O=C(OCC)C(CBr)=O, Molecular C5H7BrO3, Related Products of 70-23-5.
The di-Et pyrrole-2,5-dicarboxylate were obtained in moderate yield by a new and unexpected base-induced ring contraction from a 3,5-di-Et 2H-1,4-thiazine-3,5-dicarboxylate precursor. Its X-ray structure showing hydrogen bonded dimers was compared with those of other crystallog. characterized di-Et pyrrole-2,5-dicarboxylate.
Compounds in my other articles are similar to this one(Ethyl 3-bromo-2-oxopropanoate)Related Products of 70-23-5, you can compare them to see their pros and cons in some ways,such as convenient, effective and so on.
Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem