Modular preparation of diverse dipyrrolemethanes was written by Pham, Cindy C.;Park, Michelle H.;Pham, Jenny Y.;Martin, Sadie G.;Schramm, Michael P.. And the article was included in Synthesis in 2013.Quality Control of Ethyl 4-nitro-1H-pyrrole-2-carboxylate This article mentions the following:
A modular synthesis of polyfunctional dipyrrolemethanes is presented. Diverse side chains are introduced to 2-carboxypyrrole building blocks in two to four steps, resulting in a collection of substituted pyrroles that, when condensed in one step, give rise to diverse structural features. In the experiment, the researchers used many compounds, for example, Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7Quality Control of Ethyl 4-nitro-1H-pyrrole-2-carboxylate).
Ethyl 4-nitro-1H-pyrrole-2-carboxylate (cas: 5930-92-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Quality Control of Ethyl 4-nitro-1H-pyrrole-2-carboxylate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics